Nasa warns Earth is NOT prepared for surprise asteroid strike

Earth is NOT prepared for a surprise asteroid strike: Nasa warns'there's not a lot we can do about it at the moment' Experts have warned that humans are not prepared for an asteroid impact, and should one head for Earth, there's not much we can do about it (stock image) Back from the dead: Haunting reconstruction lets you look... Can'antacids' tackle climate change? Scientists say... Nasa and Stephen Hawking to launch a'self-healing' starship... The mystery of the'brightest supernova ever seen':... Back from the dead: Haunting reconstruction lets you look... Can'antacids' tackle climate change? Scientists say... Nasa and Stephen Hawking to launch a'self-healing' starship... The mystery of the'brightest supernova ever seen':... Nasa is planning an ambitious mission that will see a robotic spaceship visit an asteroid to create an orbiting base for astronauts.