Tex Toler watches the Llano River rise Friday in Llano, Texas, after another round of heavy rains that have brought flooding and deaths to the state. Jay Janner/TNS /Landov hide caption
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A view of a phytoplankton bloom near Alaska's Pribilof Islands. The milky green and light blue shading of the water indicates the presence of vast populations of microscopic phytoplankton. NASA hide caption
The crescent moon and, to its left, planet Venus. Y. Beletsky/ESO hide caption
A Baltimore oriole perches near apple blossoms in Mendota Heights, Minn. Universal Images Group via Getty Images hide caption
They're down there somewhere: The Great Lakes as seen from space on Wednesday. Lake Ontario, which has less ice than the others, is at the lower right. A bit of open water can be seen in Lake Superior, at the upper left. CoastWatch.glerl.noaa.gov hide caption
A woman fends off the last blast of winter and the flu season in Philadelphia this month. Matt Rourke/AP hide caption
On Monday, a weed was growing through the dry earth at Marion Kujawa's pond, which he normally uses to water the cattle on his farm in Ashley, Ill. Scott Olson/Getty Images hide caption