Clues in ancient rock suggest the early Earth did not have continents like we have today, but was covered by an ocean.
One day our star will run out of fuel and start expanding, engulfing Mercury, Venus and Earth in the process.
Around 1 billion people currently go hungry, but about 2 billion people are overeating, The Lancet commission showed.
The image confirms baby planets slice through their host star's dusty disks, leaving holes and rings in their wake.
A stable climate could be key to hosting life.
Stronger gravity requires stronger—and pricier—rockets to overcome.
Climate models are tricky. This study shows the most accurate ones predict the worst future warming.
Humans are damaging Earth and "we should think about exploring planets that may have the potential to sustain human life."
Don't cry too much about Cassini. Upcoming missions are going to Mars, Mercury, the Sun, Europa and several asteroids.
"No one from NASA ever came to me and said you can't do that. If anything they wanted to help me do it."
Researchers searching for extraterrestrial intelligence are talking about a signal observed by a telescope in Russia.
Scientists are hoping that Juno can reveal how Jupiter was formed.
A video published by NASA on Monday shows Jupiter's largest moons moving around the planet.
The Juno mission seeks information about the origins of Jupiter and our solar system.
The IMAX documentary "A Beautiful Planet" was filmed by astronauts at the International Space Station.
Mercury, Venus, Saturn, Mars and Jupiter will be visible in the pre-sunrise sky for the next month.
Just three months after the historic flyby, the New Horizons team has a paper coming out in the journal "Science."
Program scientist Curt Niebur explains new data from NASA's New Horizons mission.