It might explain the massive earthquake of 1755 which destroyed the city of Lisbon.
Black holes gobble up most matter around them, but some of it escapes, spewing nearly-light-speed jets of material.
Yesterday, Earthlings first laid eyes on an actual image of a black hole — turning what lived only in our collective imaginations into concrete reality.
Earth’s magnetic field nearly collapsed about 565 million years ago, but the planet’s core froze solid and saved it in the nick of time, a new study suggests.
A collision with a Mars-like planet could have given Earth the ingredients it needed for life to form.
Ocean temperatures reached their highest point since accurate measurements first began in the 1950s.
Billions of years ago, molecules on a lifeless and tumultuous Earth mixed, forming the first life-forms.
One of Hawking's earliest surviving wheelchairs and his groundbreaking doctoral thesis are up for auction in London.
Dark energy may be decreasing, which puts a crimp in the notion that the universe will expand forever.