Livescience.comstaff Sign up for the Live Science daily newsletter nowGet the world’s most fascinating discoveries delivered straight to your inbox.Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1'Cikai Korran came here and saw': Visitors from India graffitied dozens of Egyptian tombs 2,000 years ago2Ancient 'alien-like' skulls have been found on every continent but Antarctica. Anthropologists are starting to figure out why.3Planting trees in the sea could act as a huge carbon sink and save millions of dollars in storm damage every year. What is stopping us from doing it?4One of the most accurate smart scales we have tested is now at its lowest-ever price 5Scientists find 2 marsupial species, thought to have gone extinct 6,000 years ago, living in the forests of New Guinea