Mars may have once possessed an ocean at least as large as Earth's Arctic Ocean, a new study suggests. Previous research ...

NASA's plans for Mars sample return are effectively cancelled as part of a bill approved by the U.S. Congress, ending efforts ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Scientists have traced ancient Martian shorelines inside a giant canyon, revealing where a vast ocean once stood and why ...

Mars is absolutely dripping with evidence that the red planet was once a striking blue, complete with glistening lakes, ...

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very ...

This doesn’t mean Mars causes ice ages on its own. Orbital cycles are only part of the picture. Earth’s oceans, atmosphere, ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if ...

New simulations show red planet affects Milankovitch cycles that shape how solar energy is distributed on Earth over millions ...

A rare triple conjunction of Venus, Mars and Mercury is happening on the opposite side of the solar system to where Earth is, ...