Scientists have uncovered even more evidence that all plants which have ever lived have one common ancestor:

The bacterium was probably intended as prey but instead it became incorporated into its attacker’s body – turning it into the ancestor of every tree, flowering plant and seaweed on Earth. The encounter meant life on the planet could evolve from bacterial slime into the more complex forms we see today. “That single event transformed the evolution of life on Earth,” said Paul Falkowski, professor of biogeochemistry and bio-physics at Rutgers University in New Jersey. “The descendants of that tiny organism transformed our atmosphere, filling it with the oxygen needed for animals and, eventually, humans to evolve.”

On such small things a world can turn.