Researchers from NOAA Fisheries and Stanford University find that some petroleum compounds act as ion channel blockers in the heart cells of young tuna, disrupting normal cardiac function.
They lived in America about 13,000 years ago where they hunted mammoth, mastodons and giant bison with big spears. The Clovis people were not the first humans in America, but they represent the first humans with a wide expansion on the North American continent – until the culture mysteriously disappeared only a few hundred years […]
An expected event in Alaska could affect millions of Americans. Here’s how:
The first top predators to walk on land were not afraid to bite off more than they could chew, a University of Toronto Mississauga study has found.