Recent winter estimates count more than 750 wild gray wolves in Michigan, almost 3,000 in Minnesota and just over 1,000 in Wisconsin. Some of those wolves may occasionally travel to Illinois, where ...

Known as the genome size (GS), or C-value of a species, the amount of DNA in one entire copy of the genome can be measured either by its mass (in picograms ... is strongly skewed towards small sizes ...

Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing over a period of roughly 30 million years, but that would come to a halt ...

In its 4.5 billion year history, Earth has undergone five mass extinctions and we are potentially in a sixth era of mass ...

Experts have put the normal extinction rate for the planet at between 0.1 and 1 species per 10,000 species/100 years. A mass ...

Most people think of crocodilians as living fossils—stubbornly unchanged, prehistoric relics that have ruled the world's ...

Discover how crocodiles survived two mass extinctions thanks to their flexible diets and habitats, according to research.

"There has been a bewildering array of different ecological roles for crocodylomorphs, from terrestrial herbivores and ...

Nearby stellar explosions may have influenced two major mass extinctions on Earth. A recent study explores this link between supernovae and species disappearances. Researchers from Keele University ...

Crocodilian ancestors persisted through two mass extinction events, a feat requiring evolutionary agility to adapt to a rapidly changed world. The study's authors discovered that one secret to ...