Finding Life in Space: Why are we so special?

by Wei Lifigures by Catherine Ding The universe is massive, with an estimated 70 quintillion planets—that is 70 followed by an additional 18 zeros. In the Milky Way alone, where we reside, there are billions of planets. With these huge numbers, Earth seems very insignificant in the grand scheme of things. This raises the question: are we truly alone in this vast space of the … Continue reading Finding Life in Space: Why are we so special?

Water Beyond Earth: The search for the life-sustaining liquid

by Andrew Greenspon figures by Hannah Zucker Picture yourself as the Curiosity Rover, which landed on Mars in 2012. You’ve just arrived on Mars after an eight-month journey from Earth. You begin traveling across the Gale crater toward Mount Sharp, 18,000 feet higher than the floor of the crater. On the way, you take images with a high-resolution camera. There, you find a slab of … Continue reading Water Beyond Earth: The search for the life-sustaining liquid

It Takes Two: Twins may be the key to understanding human biology in space

by Aparna Nathan Graphics by Nicholas Lue Space: It has been the final frontier ever since Captain Kirk and Starfleet shot into space at warp speed in the 1960s. But are humans really made for space? We did not evolve for the environment of space and we don’t know how space travels affects our biology. Now, NASA has a powerful new tool to tease out … Continue reading It Takes Two: Twins may be the key to understanding human biology in space

Metal On Mars

A recent NASA mission has discovered that the atmosphere on Mars has many similarities to that of Earth. Metal atoms, contained in dust particles, float down from the solar system and become trapped in the atmosphere of a planet. Energetic particles, for example from the Sun, can then rip electrons from the metal atoms, forming ions. Historically, we haven’t known what happens to these ions. Depending on the specifics of the planet in … Continue reading Metal On Mars