Analysis
Saturday
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Friday
Participants hold up signs at a Tea Party protest at the Oregon State Capitol in September. Historian Michael Kazin says the Tea Party movement is a problem for Democrats and for Republicans, too, who have to channel the discontent to their benefit and not be consumed by it. Matt Gillis/AP hide caption
Blue whales have been singing at an increasingly lower pitch year after year. Denis Scott/Corbis hide caption
Friday
Thursday
President Obama delivers his State of the Union address on Capitol Hill in Washington, Wednesday, Jan. 27, 2010. Tim Sloan/AP hide caption
Wednesday
Thursday
Wednesday
Saturday
Producer Sasha Aslanian (right) and her brother, Joel, were 10 and 9 when their parents separated in 1978. Courtesy Sasha Aslanian hide caption