The reemergence of a keystone species sparked joy among scientists, ecologists, and biologists. The Santa Cruz kangaroo rat — a rodent related to chipmunks — used to be plentiful in the Santa Cruz, ...

Ecologists have long understood that the diversity of an ecosystem is at the heart of its stability. A groundbreaking discovery in the 1960s took it a step further and changed the way scientists ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. The Chronicle's Sunday (Nov. 11) editorial, "Will prairie dog be next anti-ESA poster child?" was ...

Four mammals and 92 fish have been found dead so far on the site of the Keystone Pipeline’s oil spill in Washington County, Kansas. Environmental Protection Agency (EPA) spokesperson Kellen Ashford ...

If you were to compile a checklist of everything you need to build a successful softball team, Keystone checks off about every box imaginable. An elite starting pitcher? Check. An explosive offense?

Also known as the eboe, choibá, tonka bean or almendro, Dipteryx oleifera is native to Honduras, Nicaragua, Costa Rica, Panama, Colombia, and Ecuador. Its hard wood is used in construction, and it ...

KEYSTONE - Animal-control officers seized 28 tigers, lions and other big cats Monday afternoon after caretakers reported that the owner wasn't providing for the animals' proper care. Deb Sullivan, ...