Now, a superhighway was detected in Canada by two scientists. It gave them the reason to guess that the worms who made its highway may have given more oxygen to the Earth.
“The tunnels that the worms left behind in the weathered rock weren't visible to the naked eye, and were detected purely by chance, says lead study author Brian Pratt, a professor of geological sciences with the College of Arts and Sciences at the University of Saskatchewan in Canada and co-author Julien Kimmig.”
The tunnels measured 0.5 to 15 millimetres (0.02 to 0.6 inches), made by worms barely a millimetre in length.
The findings were published online in the March issue of the journal Geology.
Weisberger, Mindy. 2019. 500 Million-Year-Old Worm Superhighway Revealed in Ancient Seafloor. Live Science (4 March).