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.
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.
Earth’s atmosphere contains about 21% oxygen today. Plants produce it, and animals – including humans – breathe it. Ancient rocks provide clues about when the oxygen in Earth’s atmosphere began to arise.