Scientists have found the oldest fossilized footprints made by a four-legged creature forcing a rethink on when fish first crawled out of water and onto land. The discovery of the footprints in a former quarry in the Holy Cross Mountains in south-eastern Poland is thought to be 395-million years old -- 18 million years older than the earliest tetrapod (a vertebrate with limbs rather than fins) body fossils. The report published in the science journal Nature says the footprints of the tetrapod measure up to 26 (10 inches) centimeters wide, which scientists say is indicative of an animal around 2.5 (7.5 feet) meters in length.
