The biggest unanswered question is how Venus went so terribly wrong and became such a hellish place for life.

Venus has become somewhat of a ‘forgotten planet’ with the emphasis on Mars exploration in the U.S.. But Venus can tell us about Earth’s future and about planets around other stars — I expect we...

We hope to identify these mysterious compounds — compare Venus to Earth and Mars to see how Venus went so badly wrong.

If Pluto was discovered today, it would not be a planet.