Say hello to “Scotty." The towering and battle-scarred Tyrannosaurus rex is the biggest yet discovered and the largest terrestrial predator known to science.
Last December 18, a big "fireball" or bright meteor exploded above the Bering Sea with more than 10 times the energy of the atomic blast over Hiroshima. Satellites saw it all.
For the first time, scientists made a successful in situ collection of bacteria living in hot springs in Yellowstone National Park and using an unconventional source - electricity - for food and energy.
Scientists have debated whether the dinosaurs were already in decline before a massive asteroid impact finished them off 66 million years ago. New research shows they were thriving in their final days.
Stay overnight on an Antarctic ice shelf, and you might feel the shaking from thousands of tiny quakes as the ice re-forms after melting during the day.
Chemical pollution and hunting pushed ospreys - which are large, hawk-like birds - to the edge of extinction. Now they've rebounded and can be spotted worldwide, often nesting on human-made structures.