space travel

When we think of space travel, we tend to picture a massive rocket blasting off from Earth, with huge blast streams of fire and smoke coming out the bottom, as the enormous machine struggles to escape Earth’s gravity. Rockets are our only option for escaping Earth’s gravity well—for now. But once a spacecraft has broken… Read more

Imagine seeing the lights of cities spreading around the Nile Delta and then in less than an hour gazing down on Mount Everest. The astronauts on the International Space Station (ISS) are among the lucky few who will have this humbling, once-in-a-lifetime experience of seeing the beauty of Earth from space. The ISS doesn’t just… Read more

The African lungfish, Protopterus annectens, is able to live in suspended animation, known as aestivation, without food and water for three to five years. They wake up when water becomes available. During suspended animation, animals are inactive for an extended period—they take in no food or water and make no urine or waste. They enter… Read more