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Signs of Asian carp in Chicago waterways mean there's a great risk the invasive fish could slip into Lake Michigan at any time, a witness said Tuesday in the first full day of testimony in a five-state lawsuit.
Endangered or not, wolf killings set to expand
Government agencies are seeking broad new authority to ramp up killings and removals of gray wolves in the Northern Rockies and Great Lakes.
Blowout preventer, key oil spill evidence, raised to surface
A crane hoisted a key piece of oil spill evidence to the surface of the Gulf of Mexico on Saturday, giving investigators their first chance to personally scrutinize the blowout preventer, the massive piece of equipment that failed stop the gusher four months ago.
What happened to the oil?
As reports came in of another off-shore oil rig explosion in the Gulf of Mexico, this week BP began the process of permanently sealing the leak in its undersea well. Even after 206 million gallons of oil flowed into the Gulf from late April to early August, there were claims that the BP oil had "disappeared" into the sea. But scientists question whether it's really gone.
No sign of oil spill after Gulf platform fire
The Coast Guard is saying there are no immediate signs of a spill from an oil platform fire in the Gulf of Mexico off the Louisiana coast. All 13 crew members were rescued from the water in the second such disaster in the Gulf in less than five months.