an image of dark formations on the red planet’s surface, but these aren’t real spiders. ESA was making a David Bowie reference as it highlighted some unusual features found on Mars.
The spiders are connected to seasonal changes on Mars. Carbon dioxide layers build up on the surface during winter. Spring brings more sunshine. “The sunlight causes carbon dioxide ice at the bottom of the layer to turn into gas, which subsequently builds up and breaks through slabs of overlying ice,” ESA said in a statement on April 24. “The gas bursts free in Martian springtime, dragging dark material up to the surface as it goes and shattering layers of ice up to a meter thick.
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