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By Chris Mills on at

The algal bloom in Lake Erie is particularly bad this year, thanks to a combination of agricultural runoff, sunlight, and warm water. The result, as seen by NASA’s Landsat 8, is the American Great Lakes turning slowly green. Read more >>

At this very instant, five thousand light years from Earth, near the centre of our galaxy, new stars are forming in a region of interstellar gas and dust called the Lagoon Nebula. Read More >>