There are about 269,000 tons of plastic debris in the oceans – mostly in the form of tiny particles – that are killing animals and destroying ecosystems around the globe, report researchers after a six-year study.
Once a planet and now a Kuiper Belt object, Pluto remains largely a mystery to astronomers. NASA's New Horizons space probe, now just a month away from its first observations of the mysterious dwarf planet, could provide some answers.
Why do the dunes on Titan, Saturn's largest moon, look as though they were formed by winds blowing opposite to the moon's prevailing winds? Using a decades-old wind tunnel, scientists may finally have an answer.