Raising animals for meat requires much more water - spending water - than growing plants of equal nutrition. Meat-eating has a larger "water footprint," scientists say.
On February 18, 2012, a rocket launched by a NASA-funded team from Alaska’s Poker Flat Research Range flew straight into the heart of the aurora borealis.
Air travel today mimics the flight of birds. Advances in the understanding the flight of winged insects could change the way we move from place to place.