Field biologists rappelled down a Lake Pleasant cliffside to check on bald eagle nestlings, ensuring the national bird continues to soar in Arizona.

Though the pesticide was banned in the 1970s, its effects ... pairs pre-DDT, though the actual number likely was higher, according to Sharpe, who has worked on the bald eagle's recovery for ...

Soar with eagles Learn more about the recovery of the bald eagle at these sites: • Pennsylvania Game Commission: • U.S. Fish and Wildlife Service: Sean Murphy recalled growing up in western ...

was part of the US Bald Eagle Recovery Program that helped protect wild chicks from the effects of DDT. She was unable to return to the wild and was transferred to the San Francisco Zoo ...

it began to heavily affect birds of prey. DDT made eagle eggshells too thin and caused the eggs to break. A 1963 survey found just 471 bald eagle pairs in the lower 48 states. DDT was banned in ...

Y2K, or “year 2000” was an enormously-feared computer glitch for when the millennium ticked over. At the highest level — we are, shocker, not expert programmers or computer scientists — early ...

Penn State scientists found microplastics dating back to the 1950s buried in the sediments of a river, two creeks and a lake.