Fossils from 1.6 billion years ago may be oldest-known plants

Fossils unearthed in India that are 1.6 billion years old and look like red algae may represent the earliest-known plants, a discovery that could force scientists to reassess the timing of when major lineages in the tree of life first appeared on Earth.Researchers on Tuesday described the tiny, multicellular fossils as two types of red algae, one thread-like and the other bulbous, that lived in a shallow marine environment alongside mats of bacteria.Until now, the oldest-known plants were 1.2-bi