A science team is investigating a mysterious crater on the Yamal peninsula of northern Siberia. It's about 80 meters (87.5 yards) across. No cause is yet known.
What if we'd had Twitter on July 16, 1969, the day Apollo 11 launched carrying the first humans to the moon? NASA did a live-tweet reenactment today as if we had.
Like in humans, excess fat in elephants can contribute to the development of heart disease, arthritis, a shorter lifespan and infertility, say researchers.
This Hubble Space Telescope image shows a chain of star clusters resembling a corkscrew-shaped string of pearls winding around the cores of the galaxies.