Although Mercury was geologically active in its early days, today its surface appears almost completely static. This is why it is often perceived as a dead and dry planet. A new study led by Dr.

Telltale wrinkles that cover Mercury, the closest planet to the sun, suggest it was once a larger world that has shrunk in size — and it may be shrinking more than scientists realized. The smallest ...

The smallest planet in the Solar System may have shrunk more than previously thought over the course of its history. Scientists now estimate that Mercury may have lost up to 23 kilometers in diameter ...

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If you're an avid skygazer, you may have noticed two bright objects, Venus and Jupiter, shining in the night sky this week. Now, a third planet is due to join the cosmic fun. That's right, Mercury is ...