A new study reveals fresh signs of geological activity on Venus — clues that the planet's mysterious surface is still ...

Using radar data from a NASA mission launched more than three decades ago, scientists have found fresh clues suggesting that ...

As more of the solar system has been explored and imaged, all kinds of geographical features have been mapped on many of our ...

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 ...