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Observations from the European Space Agency's Mars Express orbiter have been used to create this animation of a butterfly crater on Mars.

"A butterfly crater is created when a space rock collides with the martian surface at a low angle, causing two separate lobes (or wings) of material to be flung outwards," according to ESA.

CREDIT
ESA/DLR/FU Berlin

LICENCE
CC BY-SA 3.0 IGO or ESA Standard Licence
(content can be used under either licence)
Transcript
00:01Is this an insect? A strange fossil? Another worldly eye? Or even a walnut?
00:07No, it's an intriguing kind of Martian butterfly, spotted by ESA's Mars Express mission.
00:14But this isn't a butterfly as we know it. It's actually a type of crater,
00:19formed as a space rock hurtled towards Mars and collided with the planet's dusty surface.
00:25This collision blasted out material to either side of the crater, creating two outstretched wings of raised ground.
00:33What do you think? Can you see the cosmic butterfly?
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