Fish evolved into the first land vertebrates 420 million years ago. Clues to that fins-to-limbs transformation may lie in a walking blind cavefish in Thailand.
An ice bridge collapsed at Perito Moreno Glacier in Argentina earlier this month. Hundreds of tourists and locals gathered to witness the dramatic event.
At 5.6 million square miles, 2016 had the lowest winter sea ice maximum in the 37-year satellite record. It's slightly lower than the previous record, set last year.
Solar eruptions from our sun are nothing compared to eruptions from some other stars - so-called 'superflares'. Two scientists say our sun could also be a superflare star.