Hikers walk on the Mist Trail to Vernal Fall at Yosemite National Park in California. The National Park Service has to cut $134 million from sites around the country, including Yosemite, due to the lack of a budget deal in Congress.
Illustration of the High Arctic camel on Ellesmere Island during the Pliocene warm period, aboutthree-and-a-half million years ago. The camels lived in a boreal-type forest. The habitat includeslarch trees and the depiction is based on records of plant fossils found at nearby fossil deposits.
Federal Reserve Chairman Ben Bernanke testifies before the Senate Banking Committee in Washington last month. Some analysts wonder if he and other policymakers have kept interest rates too low for too long.
Scientists say that understanding how the cocktail party effect works could help people who have trouble deciphering sounds in a noisy environment. Guests make it look easy at a Dolce and Gabbana Lounge party in London in 2010.
Medical marijuana on display at the grand opening of the Northwest Cannabis Market's Seattle location in February. While recreational pot use is now legal in Washington, the state has not yet issued rules governing the industry.