Jawless, bloodsucking fish could help us understand how humans and all other vertebrates evolved, scientists say. Turns out, lampreys — notable for their lack of jaw and generally terrifying ...

Early jawless fish were likely to have used bony projections surrounding their mouths to modify their mouth shape while they collected food. Experts led by the University of Birmingham have used ...

3 min read During the Ordovician period, part of the Paleozoic ... extinct. Fish started becoming more widespread in the fossil record. They were small and had downward-pointing, jawless mouths ...