You are here

Malcolm Ritter

Ash species on brink of extinction

NEW YORK—Five prominent species of ash tree in the eastern U.S. have been driven to the brink of extinction from years of lethal attack by a beetle, a scientific group says.

Tens of millions of trees in the U.S. and Canada already have succumbed, and the toll eventually may reach more than eight billion, the International Union for Conservation of Nature said today.

Dinos decline cited

NEW YORK—Dinosaurs were in decline long before an asteroid strike polished them off about 66 million years ago, a study says.

It’s the latest contribution to a long-running debate: did the asteroid reverse the fortune of a thriving group of animals?

Or were dinosaurs already struggling—and the disruptive effects of the asteroid pushed them over the edge to extinction?