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

itoggle caption NASA

A Baltimore oriole perches near apple blossoms in Mendota Heights, Minn. Universal Images Group via Getty Images hide caption

itoggle caption Universal Images Group via Getty Images

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

itoggle caption CoastWatch.glerl.noaa.gov

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

itoggle caption Scott Olson/Getty Images