The oldest animal on earth was oval and flat

The oldest animal on earth was oval and flat

Neither mouth nor intestines nor anus: one of the first animals to have lived on Earth half a billion years ago, the "Dickinsonia", was oval and flat

10 cm long, it was oval and flat with a kind of central dorsal: "Dickinsonia" lived half a billion years ago at the bottom of the oceans, without mouth, intestines or anus. He would be one of the first animals to have lived on Earth, according to scientists.

Thousands of "Dickinsonia" fossils have been found on the planet for 75 years, but its belonging to the animal kingdom was debated. Researchers from the National University of Australia (ANU) have proved, according to them, decisive that the creature was indeed one of the first animals to have lived, at least the oldest ever confirmed. They described their method Thursday in the prestigious journal Science.

Bobrovskiy, a PhD student at the Australian University, analyzed remains of molecules recovered from fossils found on a cliff in north-western Russia in the White Sea region. On these fossils, he found exclusively animal molecules: a form of cholesterol.

"The fossil fat molecules we found prove that animals were large and numerous, 558 million years ago, millions of years before what was believed," says the earth sciences professor. at ANU, Jochen Brocks. For the university, it is nothing more than the "Grail" of paleontology.

Ancestor of verse
"This article brings a very good new proof that the animals are much older than the Cambrian," said David Gold, a geobiologist at the University of California-Davis. Dickinsonia species are therefore "the ancestor of many forms of animal life today," he continues. This is not yet verified, but it suggests that worms and insects may descend.

To prove that Dickinsonia was animal, however, does not mark the end of the mystery. It is still unclear how he fed (without mouth) or reproduced. In addition, statistical calculations on DNA suggest that the animal kingdom is 720 million years old. There remains a gap of about 160 million years to fill, until the appearance of this flat and oval creature.

0/Post a Comment/Comments

Previous Post Next Post