But about 3.8 billion years ago, the Martian atmosphere declined and the planet went into a deep freeze.
Ha e ntse e tsamaya ka potlako, dilemong tse ka bang dimilione tse dikete tse 2,5 tse fetileng, Kaapvaal Craton e ile ya fokotseha hape mme ya fetoha metsi a tebileng a lewatle.