There was a gene explosion about 3 billion years ago

US researchers say a new genetic explosion more than 3 billion years ago created more than half of the DNA map of all life existing on Earth, according to UPI news agency.

Scientists at the Massachusetts Institute of Technology say about 27% of the total family of existing genes was born between 2.8 billion and 3.3 billion years ago.

An ancient fossil creature,

According to biologists Eric Alm and Lawrence David, the new gene explosion occurred before some important changes occurred in Earth's original chemical composition, including the emergence of large amounts of oxygen in the atmosphere.

The fossils of billions of years old are hard to find, but it is worth noting that researchers have found a class of billions of years old molecular fossils in the genetic maps of living organisms.

American experts believe that their research can show that early organisms respond to and help change the Earth's chemical composition.

They note that the genes that use oxygen appear at the end of the gene explosion about 2.8 billion years ago, long before oxygen began to accumulate in the atmosphere about 2.5 billion years. before.