Carl Sagan holding a globe model of the planet Mars, 1970s.

Should We Go to Mars? Carl Sagan Had Thoughts

It'd be "a step more significant than the colonization of land by our amphibian ancestors some 500 million years ago." But Sagan had reservations.
An artist concept of a NASA astronaut on Mars

Why Hasn’t NASA Sent Anyone to Mars?

The Perseverance mission to Mars represents a considerable step forward for the space program. But are rovers as good as it gets?
The Mars Curiosity Rover

The Meaning of Methane on Mars

Curiosity rover's recent report of methane on Mars isn't the first time the gas has been indicated. Does it necessarily mean that Mars harbors life?
Zooming in on Schiaparelli components on Mars

Why Getting to Mars is Not So Easy

There is a reason Mars has a reputation as a graveyard for spacecraft.
Bacteria

Protecting Mars From Earthly Contaminates

Now that water has been discovered on Mars, the next step is to ensure we don't contaminate the planet with Earthly microbes and bacteria.
Credit: NASA/JPL/University of Arizona
Caption: Alfred McEwen

The Canals of Mars

We now know there's liquid water on Mars, according to NASA. But at the turn of the 20th century, we believed something else: that Mars had canals.
Black and white mapping of canals

The Extinct Civilization of Mars

Liquid water has been detected on Mars. We explore the history of the search, and the astronomer, Percival Lowell, who shook the public imagination.
Large planet with the sun in the background and moon in the foreground

So You Want to Move to Mars?

A Dutch non-profit plans to send voyagers on a one-way trip to Mars
The planet Mars

Is There Life on Mars?

Is there life on Mars? Probably not, but it's likely that there used to be.
Domestic moment with one partner on the couch looking at a tablet while raising their legs for a partner who is vacuuming

Housework, Gender Roles, and Sex: It’s Complicated

Scholars examine gender roles, sex, and egalitarianism within marriage.