Its closest living lookalike may be the lancelet, a fish-like invertebrate that lives in shallow waters around the world. Though Pikaia gracilens averaged about two inches in length during ...

It has destroyed roads and infrastructure. The official death toll (based on bodies recovered and identified) is over 43,000, but the esteemed British journal Lancelet estimates that it is really over ...

Vertebrates are distinguished by complex structures, particularly their head, which evolved for active feeding. In an article ...