Biodiversity

Scientists are finding what seems to be a global decline in caribou populations.

Florida is holding a regulated hunt to eliminate Burmese pythons that have invaded the Everglades.

Survivors of shark attacks are in Washington lobbying for new fishing restrictions to protect sharks.

"The Delaware Bay is the site of the largest horseshoe crab orgy in the world. Mating season brings millions of crabs onto the beaches, and tens of thousands of migratory shorebirds, who gorge themselves on crab eggs on their way to the Arctic."

Scientists are learning that whales are smarter, and more like humans, than they ever suspected.

"A plan to restore salmon runs on California's Sacramento River could help revive killer whale populations 700 miles to the north in Puget Sound."

"Perhaps the last thing the Navy is looking for at the moment is a tangle with environmentalists. But that is exactly what it has -- over a proposed $100 million naval warfare training range off the northern Atlantic coast of Florida."

"Two of Florida's top politicians are pushing state and federal regulators to approve a taxpayer-funded breakwater that would slow down, but not stop, erosion threatening expensive Palm Beach County condos. But biologists fear the breakwater will block sea turtles from one of the most important nesting beaches in the state."

"A unique partnership between University of Vermont researchers and a federal farm program is providing time and space for grassland songbirds to reproduce on land where their nests usually are destroyed by haying."

"The American chestnut tree, which towered over eastern U.S. forests before succumbing to a deadly fungus in the early 20th century, appears to be an excellent sponge for greenhouse gases, according to a new study."