biology

Across forests, oceans, and soils, the animal kingdom continues to add newly recognized life forms, as researchers discover, describe, and classify organisms previously unknown...

Human teeth in fish is best understood as an evolutionary comparison: structures that resemble human teeth appear in many fish species, offering clues about the deep origins of...

Could unicorns have existed as real animals? In the strict sense of a single-horned equine species, no fossil or genetic evidence supports such a creature in Earth's history. Un...

The term human face fish is used online and in conversation to describe fish species whose facial features, head shape, or visible structures appear notably human-like. This is...

Identical twins, defined as monozygotic twins who develop from a single fertilized egg that splits, occur naturally in a handful of animals but are rare or poorly documented in...

No, a gorilla cannot get a human pregnant. The genetic, chromosomal, and physiological differences between gorillas (2n=48) and humans (2n=46) make successful hybridization extr...

Bats are the only mammals capable of true flight, and their heads are finely tuned to support flight, feeding, and survival in diverse environments. The bat’s head houses adva...

Hereditary ants refer to lineages and populations of ants in which key behavioral, morphological, and physiological traits are reliably passed across generations through genetic...

Research on the fetus monkey supports advances in neuroscience, reproductive biology, and medicine while raising important ethical questions. Understanding how nonhuman primates...

The coelacanth (pronounced see-LA-kanth) is a deep-sea lobe-finned fish once thought extinct for 65 million years until living specimens were confirmed in 1938 off South Africa....