What is Mars' nickname?
AnswerThe Red Planet
Its reddish surface gives Mars its nickname.
Science · Facts & stats
Mars facts & stats
7 fact-checked facts about the planet Mars, its geology and exploration, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Mars is named after the Roman god of what?
AnswerWar
Mars was the Roman god of war.
Going deeper
What is the name of the giant volcano on Mars?
AnswerOlympus Mons
Olympus Mons is the largest volcano known in the solar system.
Which NASA rover landed in Gale Crater in 2012?
AnswerCuriosity
Curiosity touched down in August 2012.
What is Valles Marineris?
AnswerA vast canyon system
It stretches thousands of kilometers across Mars.
Expert level
What gas makes up most of Mars' thin atmosphere?
AnswerCarbon dioxide
The Martian atmosphere is about 95% carbon dioxide.
What was the first rover to drive on Mars, in 1997?
AnswerSojourner
Sojourner arrived with the Mars Pathfinder lander.
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