By rights, the much fainter sun two billion years ago should have left Earth as a giant snowball, incapable of developing life.
A new chemical analysis of lunar material collected by Apollo astronauts in the 1970s appears to disprove theories that the moon was created through a massive collision between Earth and a Mars-sized object 4.5 billion years ago.
Scientists have concluded that the Earth's early atmosphere was loaded with greenhouse gases - by examining fossilized raindrop impressions.
Scientists say they've found more evidence of a major impact by a comet or asteroid, some 13,000 years ago.
By observing the way the moon reflects light from the Earth, astronomers have established that there's life on our planet - not as pointless as it seems, as the technique could help find life elsewhere.
The stricken Russian spacecraft, Phobos-Grunt, is likely to crash to Earth on Sunday or Monday, say scientists tracking its path.
NASA's Deep Space Network antenna has captured new radar images of Asteroid 2005 YU55 as it approaches Earth in what's set to be the closest approach of a big asteroid ever recorded.
Ever wondered exactly what would happen if a massive meteorite hit the Earth? Princeton University scientists can show you.
The Earth is enveloped in a strong-to-severe magnetic storm, following a large solar eruption yesterday morning.
Using data from the STEREO spacecraft, researchers at Southwest Research Institute and the National Solar Observatory have released a video of a coronal mass ejection in 2008 swallowing up the Earth.
Call me paranoid, call me crazy, but I've had a theory for a long time that we're somewhat overdue for a mass alien invasion.
A team of international researchers has discovered more proof that areas of North America and Antarctica were connected over a billion years ago. Their evidence predates the formation of the super continent Pangaea.
SpaceX CEO Elon Musk believes the human race should aspire to colonize the solar system, rather than just making do with inhabiting planet Earth.
Data from NASA's Terra satellite shows that, when the climate warms, the atmosphere's more efficient at releasing energy to space than believed.
It's two and a half thousand years since the Greek philosopher Philolaus suggested the existence of a 'counter-Earth' - another planet sharing Earth's orbit.
Around half the 44 trillion watts of heat that flows from the interior of the Earth is the remaining heat from the planet's creation.
The inner core of the Earth appears to be simultaneously melting and freezing, because of heat circulation in the rocky mantle that covers it.
Imagine looking up into the sky and seeing a giant asteroid the size of an aircraft carrier. Scary, eh? But don't worry, because although scientists predict the fly-by will happen this fall, they aren't concerned about a possible collision.
Last Friday's quake in Japan has likely shortened the length of the planet's day and shifted its axis, says a NASA scientist.
The internet is awash with rumors that this month's 'supermoon' - a full moon coinciding with the moon's closest approach to earth - will bring earthquakes, volcanic eruptions and floods.