Asteroid 2019 OK is a sizable chunk of rock, but it’s nowhere near as big as the ones capable of causing an event like the dinosaurs’ extinction. More than 90 percent of those asteroids, which are 1 ...

NASA has found sugars essential for life on Earth in samples of the 4.6 billion-year-old Bennu asteroid. Scientists discovered glucose, the human body’s main source of energy, as well as the critical ...