Fossils excavated from the fossil-rich Bighorn Basin in Wyoming shed new light on the different physical and behavioral traits of early carnivorous mammals known as hyaenodontids.
Male crickets emit a high-frequency chirp to startle potential female mates into revealing their location. This, researchers say, likely evolved from males impersonating predatory bats.
Researchers from University of Queensland have identified one of Australia's newest dinosaurs, Kunbarrasaurus. This dinosaur's unique characteristics suggest it is a distinctly different species than previously classified.
Some prairie voles are monogamous, while others seek out multiple mates. In a recent study, researchers from the University of Texas at Austin reveal sexual behavior is largely controlled by genetic differences in the rodents' brains, suggesting natural selection has allowed for both characteristics to co-exist.
Scientists have discovered a new member of the Ceratopsia dinosaur family, but it lacked horns and was the size of a small dog.
Cheetahs migrated to Africa from North America 100,000 years ago during the last Ice Age. Following their "big move," populations dwindled and incestuous breeding increased. This troubled linage has had a lasting impact on modern Cheetahs, many of which have difficulty reproducing due to a gene mutation that affects sperm development.
Well-preserved mosasaur fossils represent a new smallish marine reptile that used binocular vision to hunt at night.
A new species of toothy pterosaurs named Cimoliopterus dunni sheds light on the evolution of these flying reptiles. However, its closest relatives are from England, suggesting the prehistoric animals were able to "island hop" as the North Atlantic Ocean widened during the Cretaceous.
When dating volcanic ashes from the Late Triassic Period from Argentina, researchers discovered dinosaurs evolved more rapidly than previously thought. In fact, the prehistoric animals evolved roughly five million years or less after their ancestors emerged.
Some parasitic wasp species lay their eggs in the bellies of wolf spiders so that the larva can feed of the vertebrates' blood. While this does not harm the spiders initially, when the larva mature they end up killing their hosts. The recent findings highlight the diverse parasitic relationships among animals.
While there has been much debate regarding how cats first made their way to Australia, a new study has confirmed that the invasive felines arrived with European settlers in the 19th century.
Using three male and three female sand flies from a Brazilian state park, researchers have unveiled a new species of the pesky, disease-carrying bugs.
By examining the hind and forelimbs of a tiger salamanders, researchers have revealed how they may have transitioned from life at sea to life on land.
After analyzing a fossilized three-horned skull and dental remains, researchers have classified Xenokeryx amidalae as an ancient species is actually a distant relative of modern giraffes.