Scientists have discovered fossils of the oldest plants in the world an estimated 472 million-year-old in Argentina.

The fossil is the moss heart, a simple species that do not have roots or stems. "The possibility of this plant is the ancestor of all plants," said Dr Rubeinstein from the Department of Paleontology at the Argentine Institute of Snow, Ice and Environmental Research in Mendoza, Argentina.

According to him, heart moss is one of the oldest plant species because it has a very simple spores, called cryptospores. Plants are thought to have evolved from algae is found in the Sierras Subandinas region, northwestern Argentina.

Before the discovery of fossils of heart mosses, the scientists named the species of plants from Saudi Arabia and the Czech Republic as the oldest plant in the world with 462 million years old.