The lepidosaurs are a large and diverse group of land vertebrates that include the snakes and lizards. There are almost 12,000 species of these animals....
Speciation may be defined as the separation of populations of animals or plants that resemble one another closely and originally able to interbreed—into...
Two separate studies claim massive tsunamis and earthquakes from an asteroid impact profoundly affected the rock record. One research team modeled a...