Solar system's tiniest planet may be hiding layer of diamond 10 miles thick
![Solar system's tiniest planet may be hiding layer of diamond 10 miles thick](https://e3.365dm.com/24/07/1920x1080/skynews-mercury-diamonds-planet_6638667.jpg?20240725102804)
It may be the smallest planet in the solar system but Mercury could be hiding a big secret.
It may be the smallest planet in the solar system but Mercury could be hiding a big secret.