The record-breaking mission offers an unprecedented opportunity to study the geology of our planet’s largest layer.

An exoplanet called HD 137010 b might be the closest thing astronomers have ever seen to “Earth 2.0.” The trouble is that it’s only been seen once—and may never be glimpsed again ...

Scientists have long opposed polar geoengineering. Some now believe it will be necessary.

The Purple Earth Hypothesis has significant implications for the search for life on other planets.

Humans have long been obsessed with building big, and as the world strives to combat climate change, megastructures may hold the key to a more sustainable future.

Astronauts of the future may be radically different from the rest of us in physiology and psychology. So, to what extent might they resemble or represent ordinary humans?

Let’s put ICE and, indeed, war itself –the smugly violent certainty of militarism – into the largest perspective possible. I ...

Once a month, we feature a story from Lightspeed’s current issue. This month’s selection is “Death Echoes Overlapping” by ...

Measurements of seismic waves over many years suggest the Earth's core is deformed and reshaped by conditions of extreme heat ...

"A strong magnetic field is very important for life on a planet." ...

The chemicals that helped save the ozone layer may be quietly seeding the planet with an indestructible pollutant.

Scientists are beginning to read Earth in a different way, not from orbit, but from the surface of the moon. A recent study, ...