It's Spring!

It's Spring!

Why do we have seasons?
Evolution of the moon

Evolution of the moon

Why do we need the moon?
Astronomers find ‘billions of planets’

Astronomers find ‘billions of planets’

There are other planets everywhere we look in the sky
ET hasn't phoned home … yet

ET hasn't phoned home … yet

Scientists say sorry for false alarm over alien contact
Mars Science Laboratory blasts off

Mars Science Laboratory blasts off

NASA launches Mars Curiosity rover

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From Iron Man's mask to electric guitars, 3D printing is building a new world.