People worldwide are celebrating Darwin's life.
As recently as 2011, Hawking remarked, "Scientists have become the bearers of the torch of discovery in our quest for knowledge."
The late environmentalist, Sen. Gaylord Nelson, D-Wis., founded Earth Day as an environmental teach-in first held on April 22, 1970.
Unionists and environmentalists face common enemies - in corporate suites and Congress.
A leading sea ice expert has predicted the final disappearance of Arctic ice in the summer within four years.
Ignoring the collective outrage of environmental groups, oil giant Shell began drilling into the Arctic, boring holes 1,400 feet beneath the Chukchi Sea's floor.
Union leaders decry "job destruction program," as workers, unions, small business owners and community activists fight to save 23,000 Florida jobs at NASA and beyond.