Scientists say the Earth could have been formed from planetary objects colliding with each other

Early Earth may have been donut-shaped: study

From mining asteroids to private space flights and even space tourism, here's what you can expect in space exploration in 2017

Out-of-the-world space expeditions

The $600 million Kepler mission has allowed scientists to discover more than 4,600 planets since it was launched in 2009

Scientists think that there may have been enough heat-producing elements within Pluto?s rocky core to melt part of the planet?s ice shell

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