火星探索

Nathalie Cabrol looks for life on Mars by studying extreme places on Earth, where the atmosphere is thin, ultraviolet radiation is high and the temperature is varied. See photos from her expeditions.

The past, present and future of food in space — from astronaut ice cream to “Enchilasagna” on Mars.

People are obsessed with Mars. But … why? Two confessed super-fans, Andy Weir, author of “The Martian,” and Stephen Petranek, author of “How We’ll Live on Mars,” share thoughts on why being Mars-mad is a reasonable state of mind.