Ancient fossil 'may prove scorpion was first land-dwelling animal'

Fossil is earliest evidence of breathing structure compatible with life on land, scientists say

Fossil experts in the US have revealed the remains of what they say is the first animal that may have set foot on land - an ancient scorpion.

The earliest animals were aquatic, but eventually transitioned on to land. While scorpions are known to be one of the first animals to have become fully land-dwelling, experts say the two new fossils add to a growing debate about when animals made the shift.