WIRED @WIRED
Did you know Mars has spiders? Well, sort of. This is part of the Martian southern polar ice cap. During the springtime, frozen carbon dioxide sublimates from a solid to a gas and gets trapped beneath the surface—creating these dark spider-like features: https://t.co/DZ7AIS4FS7 https://t.co/NB4Bhc7yKT — PolitiTweet.org