Science and Medicine

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Abernathy Spring

Abernathy Spring is a mineral spring located in Polk County, 2.8 km (1.75 mi.) east of the unincorporated community of Big Fork on the north side of State Highway 8. Elevation is 335 meters (1,099 ft.). The spring was owned by Rufus J. Abernathy (1856–1932), who resided at Big Fork and is buried at the Pleasant Grove Cemetery just outside of town and east of the spring. Water from the spring drains into adjacent Big Fork Creek (a tributary of the Ouachita River) and, at one time, was used for domestic purposes, such as for water supply and to keep food cold. There are actually two springs at this location—the primary one is a 75 cm (29.5 in.) diameter galvanized …

Abington, Eugene Hardeman (E. H.)

Eugene Hardeman (E. H.) Abington, a physician, practiced medicine and pharmacy in Arkansas and Oklahoma for more than sixty years and wrote about his career in his 1955 book Backroads and Bicarbonate: The Autobiography of an Arkansas Country Doctor. From 1927 to 1937, he served as the first president of the Junior Agricultural School of Central Arkansas (which later became Arkansas State University–Beebe), a school established by his older brother W. H. Abington. Born on April 20, 1873, in Des Arc (Prairie County) and raised in Beebe (White County), E. H. Abington was the second son in the farming family of William T. Abington and Mary Jane Plant Abington. He had one older sister and one older brother, William Henry …

Abington, William Henry

William Henry (W. H.) Abington, a physician and a Democratic politician, served as a state senator and a state representative in the Arkansas General Assembly from 1923 to 1951. From 1929 to 1931, he was speaker of the Arkansas House of Representatives. As a legislator, he supported medically oriented legislation and established the Junior Agricultural School of Central Arkansas (now Arkansas State University–Beebe) in 1927. W. H. Abington was born on January 2, 1870, in Collierville, Tennessee, to the farming family of William T. Abington and Mary Jane Plant Abington. He had an older sister and a younger brother. His family moved to White River (Prairie County) in 1870 but had relocated to Union (White County) by 1880. His brother, …

Abortion

Abortion is defined as either a spontaneous early ending of a pregnancy (a.k.a. miscarriage) or an induced early ending of a pregnancy. In Arkansas, amidst changes in abortion’s legal status over the years, women have sought abortions for various reasons, including maternal and fetal health problems, financial concerns, and the stigma of single pregnancy. On March 9, 2021, the Governor Asa Hutchinson signed into law a bill that outlawed all abortions, with no exception for the termination of pregnancies due to rape or incest, save those performed to save the life of the mother in a medical emergency; this law was designed to set up legal challenges to the U.S. Supreme Court precedent of Roe v. Wade and came two years after …

Acanthocephalans

aka: Spiny-Headed Worms
aka: Thorny-Headed Worms
These cylindrical metazoan worms, superficially similar to nematodes, belong to the phylum Acanthocephala and include four classes, ten orders, twenty-six families, and about 1,300 species. Recent molecular studies suggest that Rotifera (rotifers) and Acanthocephala are phylogenetically related sister groups. Adult members are highly specialized, dioecious (having distinct male and female colonies, as opposed to hermaphroditic) parasites of the intestinal tract of a variety of vertebrates (but not generally humans). They cause serious disease fairly rarely. The life cycle involves at least two hosts, either an aquatic intermediate host (Amphipoda, Copepoda, Isopoda, and Ostracoda) or terrestrial intermediate hosts including insects, crustaceans, and myriapods. Fishes, amphibians, reptiles, birds, and mammals serve as definitive hosts. Acanthocephalans range from 0.92 to 2.4 millimeters long …

Act 1220 of 2003

aka: Childhood Obesity Act
Act 1220 of 2003, which launched comprehensive efforts to curb childhood obesity in Arkansas, established one of the nation’s first statewide, school-focused initiatives to help children reach and maintain a healthy weight. Shaped largely by key legislators, including Senator Hershel Cleveland, with input from state and national public health experts, the act passed through the Arkansas General Assembly with strong support from the House and Senate under the administration of Governor Mike Huckabee. After passage, however, several components of the act faced vocal opposition. Opponents feared the largely unfunded mandates would strain educational and healthcare systems in addition to shaming overweight students. This vocal opposition prompted changes to the act in the years following its passage. Subsequent evaluation of Act …

Act 911 of 1989

aka: Arkansas Conditional Release Program
Act 911 of 1989 pertains to the evaluation, commitment, and conditional release of individuals acquitted of a crime when found Not Guilty by Reason of Mental Disease or Defect. The evaluation process, completed by a certified forensic psychologist or psychiatrist, assesses the defendant’s fitness to proceed to trial and, if the defendant is found fit to proceed, mental state at the time of the crime. If the defendant is found not fit to proceed, the proceedings against the defendant are suspended, and the court may commit him/her for detention, care, and treatment at the Arkansas State Hospital (ASH) until restoration of fitness to proceed. Once fit to proceed, a re-evaluation includes an assessment of mental state at the time of …

Adams, Elizabeth Lucille (Betty Lu) Hunter Sorensen

Elizabeth Lucille (Betty Lu) Hunter Sorensen Adams was a pioneer occupational therapist at Arkansas Children’s Hospital as well as the founder and second president of the Arkansas Occupational Therapy Association and its first delegate to a national conference. She has also distinguished herself as an artist and writer. Betty Hunter was born on February 3, 1926, in Tokyo, Japan, the daughter of Joseph Boone and Mary Cleary Hunter, both missionaries; she has one brother. The Hunter family came to Arkansas when, due to the Depression, there were no funds to return to missions. They lived in Little Rock (Pulaski County), where her father founded Pulaski Heights Christian Church. In 1940, the family left Little Rock to return to Japan but …

AIDS

By 2007, a cumulative 4,119 Arkansans had been diagnosed with Acquired Immunodeficiency Syndrome (AIDS), the disease caused by the Human Immunodeficiency Virus (HIV), with 196 of those cases being newly diagnosed in that year. Of all cases diagnosed in Arkansas, more than eighty percent were among men, fifty-seven percent were among whites, and forty percent were among African Americans. However, among cases newly diagnosed in 2007, the majority (fifty-five percent) were among African Americans, with only thirty-seven percent of new cases being among whites. This trend follows national rates of proportionally more cases being diagnosed among African Americans and other minorities. Of those 4,119 diagnosed with AIDS, more than 2,000 were people living with AIDS as of the end of …

Alford, Thomas Dale

Thomas Dale Alford was a prominent Arkansas ophthalmologist, Episcopalian, radio announcer, civic leader, and politician remembered largely as a leader of opposition to federally mandated desegregation during the crisis at Central High School in Little Rock (Pulaski County). Alford’s role as a leading segregationist came first through his seat on the Little Rock School Board and then as the “Segregation Sticker Candidate” who upset incumbent Democratic U.S. Representative Brooks Hays after a notorious ten-day write-in campaign in the 1958 election for the Fifth Congressional District of Arkansas. Dale Alford was born near Murfreesboro (Pike County) on January 28, 1916, the son of T. H. Alford and Ida Womack Alford, both of whom were itinerant school teachers. His father ultimately became …

Algae

Arkansas has a very diverse assemblage of algae. The majority of the research conducted on algae in the state is published in the Arkansas Academy of Science’s journal, but some is available in other journals and government publications. Most of the studies have been performed in northern Arkansas by Dr. Richard L. Meyer from the University of Arkansas (UA) in Fayetteville (Washington County). He and his graduate students undertook many studies that were developed into MS and PhD theses. The studies were performed in rivers (Buffalo, White, Arkansas, and Mississippi rivers), a few lakes (Lake Chicot, Lake Fort Smith, and Lake Fayetteville), a few smaller ponds, a stream, and an agricultural rice field. Three studies were done in Hot Springs …

Alligator Snapping Turtle

The alligator snapping turtle (Macrochelys temminckii) is North America’s largest freshwater turtle. This turtle is found primarily in major rivers, streams, swamps, and oxbow lakes throughout much of the south-central United States—all around the states of Arkansas and Mississippi and in portions of Texas, Oklahoma, Kansas, Missouri, Illinois, Iowa, Georgia, and Florida. Alligator snapping turtles have distinct morphological features that distinguish them from their closest cousin, the snapping turtle (Chelydra serpentina). For example, the dorsal shell, or carapace, of the alligator snapping turtle has three prominent keels (ridges on the carapace), whereas the keels of the snapping turtle are low and become less conspicuous with age. The tails of both species have three rows of tubercles (warty projections), but these scales …

Alzheimer’s Arkansas

Alzheimer’s Arkansas is an incorporated nonprofit organization governed by a local board of directors consisting of family members of Alzheimer’s patients, business and community leaders, and healthcare professionals. The organization offers an array of programs and services, including respite care, home improvements (such as wheelchair ramps), and educational tools. All services are funded through special events, grants, memberships, memorials, and other contributions; eighty-five percent of all contributions received are spent in Arkansas. Alzheimer’s Arkansas was founded as the Alzheimer’s Support Group of Central Arkansas in 1984. In 1986, the group affiliated with the national Alzheimer’s Association. In June 2002, however, the Alzheimer’s Arkansas Board of Directors elected to withdraw from the national association and become an independent nonprofit organization. Several …

American Alligator

The American alligator (Alligator mississippiensis) belongs to the class Reptilia, order Crocodylia, superfamily Alligatoroidea, and family Alligatoridae. There are seven species in the family endemic to the New World tropics, with an eighth species occurring in the warmer temperate regions of China. The American alligator is endemic to the southeastern coastal plain of the United States, where it inhabits freshwater wetlands such as streams, reservoirs, ponds, lakes, coastal marshes, bayous, oxbows, and cypress swamps associated with larger rivers in parts of Alabama, Arkansas, Florida (and some Florida Keys), Georgia, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Texas, and Virginia; it also occurs in the lower Rio Grande Valley of Texas south of San Antonio, and farther south into the thornscrub …

American Burying Beetle

aka: Giant Carrion Beetle
The American burying beetle (Nicrophorus americanus)—which belongs to the Phylum Arthropoda, Class Insecta, Order Coleoptera, and Family Silphidae—is a carnivorous beetle that feeds on and requires carrion to breed. It is the largest North American carrion beetle. In July 1989, it was placed on to the federal Endangered Species List; the International Union for Conservation of Nature (IUCN) currently lists the species as critically endangered. However, the U.S. Fish and Wildlife Service has proposed to downlist N. americanus from endangered to threatened under the Endangered Species Act. In the few states in which it is found, including Arkansas, it is ranked S1 (critically imperiled) by NatureServe. The decline of N. americanus has been attributed to habitat loss, alteration, and degradation, …

American Eel

The American eel (Anguilla rostrata) belongs to the order Anguilliformes and family Anguillidae. Common names include Atlantic eel, common eel, freshwater eel, silver eel, yellow-bellied eel, green eel, black eel, bronze eel, elver, whip, and easgann. This family includes about eighteen facultative catadromous species of eels. The American eel ranges from Greenland and Iceland and all the drainages of eastern North America along the Atlantic and Gulf slopes west to New Mexico and south to Venezuela and islands of the Caribbean and West Indies across a latitudinal range of 5 to 62° N. In North America, A. rostrata occurs inland from eastern Canada to the Great Lakes, in the headwaters of many Atlantic and Gulf slope rivers, and in the …

American Red Cross

The American Red Cross has been active in Arkansas since the second decade of the twentieth century. As an organization operated principally through volunteer labor, the Red Cross has assisted citizens of Arkansas through floods, droughts, and fires, as well as training Arkansans in emergency response and in health and safety. Three chapters of the Arkansas Red Cross serve various regions in the state of Arkansas, meeting the needs of Arkansans and disbursing help from Arkansans to meet needs all over the world. The American Red Cross was founded in Washington DC on May 21, 1881, with Clara Barton as its first director. The first Red Cross chapters founded in Arkansas began during World War I, when the number of …

Ammonites

aka: Ammonoids
Ammonites are an extinct group of marine invertebrates in the Phylum Mollusca, Class Cephalopoda, and Subclass Ammonoidea. The subclass can be divided into six orders as follows: Agoniatitida (present in the Lower Devonian–Middle Devonian), Clymeniida (Upper Devonian), Goniatitida (Middle Devonian–Upper Permian), Prolecanitida (Upper Devonian–Upper Triassic), Ceratitida (Upper Permian–Upper Triassic), and Ammonitida (Lower Jurassic–Upper Cretaceous). The name “ammonite,” from which the common name is derived, was inspired by the spiral shape of their fossilized shells, which somewhat resembles tightly coiled ram’s horns. These molluscs are more closely related to living coleoids (e.g., cuttlefish, octopuses, and squid) than they are to shelled nautiloids, such as extant chambered Nautilus species. The earliest ammonites originated from within the bactritoid nautiloids, appearing during the Devonian …

Amphibians

Arkansas has within its borders a modest assemblage of salamanders, frogs, and toads, which are taxonomically grouped in the class Amphibia and, therefore, are commonly called amphibians. Amphibians were the first tetrapods (four-legged vertebrates) to walk on land, having come from an early-evolving group of lobe-finned fishes nearly 360 million years ago. Today’s amphibians possess a mostly bony skeleton with a strong “backbone” comprising a series of interlocking vertebrae. Salamanders are termed caudates because they possess a tail in both the juvenile and adult forms, whereas frogs and toads (collectively called anurans) lack tails as adults even though the larvae (tadpoles) possess them. The study of amphibians has been traditionally linked with the study of reptiles in the professional field …

Amphipods

aka: Scuds
Amphipods belong to the Phylum Arthropoda, Class Crustacea, Subclass Malacostraca, and Order Amphipoda. The Malacostraca contains seventy percent of all known crustaceans. Over 10,000 species of amphipods are currently recognized. Twenty species of amphipods are known from Arkansas, with most being found in groundwater environments. Traditionally, amphipods have been placed in four suborders: the Caprellidea, Gammaridea, Hyperiidea, and Ingolfiellidea. The Gammaridea, which contains the majority of species, includes all the freshwater and semi-terrestrial taxa. The Hyperiidea includes the pelagic amphipods, which are associated with other planktonic forms such as gelatinous zooplankton (medusae and ctenophores). Hyperiids are usually characterized by very large eyes, although some forms, like gammarideans, have normal-sized eyes. Hyperiid members are a polyphyletic group, and it is thought …

Annelids

aka: Segmented Worms
The phylum Annelida consists of over 22,000 living species of segmented worms. They include earthworms, leeches, and ragworms. Annelids are bilaterally symmetrical, triploblastic invertebrates that inhabit a wide diversity of habitats, including marine environments such as tidal zones, hydrothermal vents, lotic and lentic freshwater habitats, and moist terrestrial habitats. The term “Annelida” originated in 1802 from French naturalist, Jean-Baptiste Lamarck’s (1744‒1829), annélides. Several species of annelids can be found in Arkansas. The overall classification of the phylum is undergoing significant revisions and has not yet been stabilized completely. Phylogenomic and other molecular phylogenetic analyses have shown that taxonomic groupings previously based on morphology in many cases are invalid. The phylum was previously divided into three classes as follows: Polychaeta (marine, …

Apicomplexans

aka: Sporozoans
The protistan Phylum Apicomplexa (formerly Sporozoa) contains a tremendous variety of obligate intracellular parasites infecting many different organisms, including humans. As a group, these parasites are cosmopolitan in their range of infected hosts and geographic distribution. They include such diverse parasites as coccidians, cryptosporids, gregarines, haemosporoids, and piroplasms. All are united, not by their biology or life histories, but morphologically by the presence of a unique structure called an apical complex. The classification scheme that cites this structure has a practical purpose to sort this diversity in a functional manner that can: (1) be easily understood and, (2) serve a utilitarian purpose by non-specialists. However, the field of classifying Apicomplexa is in flux; indeed, its taxonomy has changed throughout the …

Arachnids

Arachnids belong to Chelicerata, one of four groups of living arthropods. The other three groups are Crustacea, Myriapoda (centipedes and millipedes), and Hexapoda (insects and relatives). There are eleven living arachnid orders, and Arkansas has representatives of five of these including Scorpiones (scorpions), Pseudoscorpiones (pseudoscorpions), Opiliones (harvestmen), Aranea (spiders), and Acari (mites). Overview of Arachnids Arachnid bodies are divided into two main regions called the prosoma (cephalothorax) and opisthosoma (abdomen). These regions have been subdivided in some groups (e.g., solifugids, scorpions). The prosoma holds six pairs of appendages. Unlike in all other arthropods, the first appendages in chelicerates are not sensory antennae but pincer-like mouthparts known as chelicerae (hence the subphylum name). Behind the chelicerae, there are two pedipalps that …

Arkansas Academy of Science

The Arkansas Academy of Science (AAS) aims for the promotion of knowledge in the fields of science, engineering, technology, and mathematics and the diffusion of that knowledge. The AAS is the Arkansas component of the American Association for the Advancement of Science. The first meeting of the Arkansas Academy of Science occurred in 1917. The AAS was created by a group of Arkansas scientists who wanted to develop a vehicle for the promotion of science as well as dissemination of research by Arkansas scientists. This was achieved by organizing annual meetings and publishing a journal. The annual meetings include sessions in which fledgling scientists present their findings in areas of biological and physical science as well as engineering, mathematics, and …