Astronomers do not know where thousands of “city-killer” asteroids are, Nasa’s head of planetary defence has admitted.

The object is hurtling towards the Earth at a zippy 12,616 miles per hour, according to data from the space agency.

Two new satellite missions will help NASA scientists better understand Earth and improve the ability to foresee environmental ...

The discovery is just the latest to come from the asteroid sample, which dates back to the dawn of the solar system.

Scientists may be one step closer in their hunt for signs of past life on Mars after the Curiosity rover's latest find.

NASA says Earth is about halfway through its lifespan. Scientists explain how solar changes could affect habitability, oceans, and the planet’s future over billions of years ...

Earth’s oxygen-rich atmosphere, the very thing that allows complex life to exist, may not last forever. Coupled biogeochemistry and climate simulations estimate that the planet’s breathable air could ...

Two next-generation satellite missions announced Thursday will help NASA better understand Earth and improve capabilities to ...

Thousands of “city killer” asteroids remain undetected, NASA warns, and no ready spacecraft exists to stop one. A recent close call exposed gaps that scientists say still leave Earth vulnerable.

Scientists estimate that around 15,000 medium-sized asteroids — large enough to devastate a city — remain undetected within ...

NASA officials warn that around 15,000 'city-killer' asteroids remain undiscovered, many lurking in a stubborn observational blind spot near the sun.

Glaciologist Helen Fricker will use a cutting-edge Lidar imaging system to study some of the world’s most isolated spots.