|                                                                                   |                                                                                   One of the rovers in Japan's Hayabusa2 mission caught this image yesterday as it bounced after landing on asteroid Ryugu. The bright white region - and blue area - are distortions, caused by sunlight. Image via JAXA/Hayabusa2. |                                                                                   |                                                                            |                     
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                                                                                                    Birds flying south. How many will return?    |                                                                                   |                                                                                  Contrary to popular thought, birds wintering in the tropics survive the winter better than birds wintering in the U.S. That's despite the fact that tropical wintering birds migrate 3 to 4 times farther. Read more.    |                                                                                   |                                                                            |                     
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