Scientists have discovered what the earliest signs of movement on Earth could be.
They found rope-like mucus that was left in West Africa by a snail dragged through mud 2.1 billion years ago.
The threads The rock dug in rock in Gabon finds the record for the oldest evidence of movement on Earth.
Earlier evidence existed 570 million years ago, but the new discovery pushes this back by 1.5 billion years. The results were published in the journal PNAS.
Scientists at the French National Center for Scientific Research (CNRS) used state-of-the-art X-ray technology to study the ancient rocks without breaking them.
They showed that the old mucous threads are up to 6 mm in diameter and extend 17 cm through the rock.
They were scientists believe.
Tiny creatures, now called amoebas, do so when resources are scarce.
The ancient snail would have done it From time to time, he moved to find new food sources in his wet, muddy habitat.
At that time, the earth was largely covered by calm, shallow oceans – with little land in sight.