Evolutionary Biology
Hippos lived in ice age Germany until 31,000 years ago
New research reveals that hippos survived in central Europe much longer than previously believed, persisting in Germany's Upper Rhine Graben until about 31,000 years ago. Ancient DNA and radiocarbon dating show these animals coexisted with mammoths during a milder phase of the last ice age. The findings challenge earlier timelines of hippo extinction in the region.
Birds worldwide share evolved warning cry against parasites
AI에 의해 보고됨
An international team of researchers has discovered that birds across four continents produce nearly identical whining vocalizations to warn against brood parasites. This learned response builds on an innate sound, marking the first known example of such a hybrid vocalization in animals. The findings, published October 3 in Nature Ecology and Evolution, highlight how natural selection shapes cooperative communication.
Scientists discover teeth growing on ratfish head
Researchers have found genuine teeth developing on the forehead of the spotted ratfish, challenging the idea that vertebrate teeth evolve only in jaws. The discovery, detailed in a new study, reveals that these head teeth share genetic origins with oral teeth and aid males in mating. This finding reshapes understanding of dental evolution in cartilaginous fish.
Human skulls evolved faster than those of other apes
Researchers at University College London have discovered that human skulls evolved at an exceptionally rapid pace compared to other apes, developing larger brains and flatter faces twice as quickly as expected. This acceleration likely stems from cognitive and social evolutionary pressures. The findings, based on 3D skull models, highlight unique human adaptations among great apes.