Footprints of the First Fish to Walk on Land 史上最早爬上陆地鱼类脚印化石曝光
关键词:fish, footprints, evolutionary history
Four hundred million years ago fish took their first 1)tentative steps onto dry land. It marked a turning point in the evolution of life on Earth, and here’s the proof. These are footprints of the first fish to have grown feet and walked on land. Look closely and you can see that these are not fins, they’re toes, and the creature didn’t 2)slither or drag itself on its stomach, it walked 3)on all fours. The discovery was made here by scientists sifting through rocks in the 4)Holy Cross Mountains of southeastern Poland. And this is what the creature might have looked like; the ancestor of all large land animals, including us.
The emergence of fish from the sea was one of the key moments that transformed the evolution of life on Earth. Today’s discovery suggests that that might have happened nearly 20 million years earlier than previously thought. So the scientific textbooks will now have to be rewritten.
Scientist: There’s a whole enormous gap of evolutionary history that’s opened up beneath our feet. No one knew it was there. No one suspected it was there. There’s an awful lot out there left to discover about the early history of life on land.
Once the first fish made their way onto the shore, it kick-started a process that scientists believe led to the 5)multitude of species that now 6)populate the earth today.