NASA's Mars helicopter Ingenuity has phoned home after 63 days of silence, and all appears to be well with the little rotorcraft.

The enormous dark patch and its powerful eruption are both signs that the solar maximum is fast approaching — and could be more active than expected.

The extent of sea ice in Antarctica has shrunk compared with the long-term average for this time of year between 1981 and 2010 by an area four times the size of Texas.

From Pliny the Elder to the Swedish naturalist Carl Linnaeus, historians and naturalists have found many ways to describe these fascinating apex predators.

Aphelion marks the point in our planet's orbit of the sun when it's at its maximum distance from our star. So why is it so hot out?

Scientists are testing vaccines as potential treatments for Alzheimer's, in an attempt to reign in harmful immune activity tied to the disease.