Photosynthesis More recent studies, reported in March 2018, also suggest that photosynthesis may have begun about 3.4 billion years ago. The main source of oxygen in the Earth's atmosphere derives from oxygenic photosynthesis, and its first appearance is sometimes referred to as the oxygen catastrophe. Geological evidence suggests that oxygenic photosynthesis, such as that in cyanobacteria, became important during the Paleoproterozoic era around 2 billion years ago. Modern photosynthesis in plants and most photosynthetic prokaryotes is oxygenic. Oxygenic photosynthesis uses water as an electron donor, which is oxidized to molecular oxygen () in the photosynthetic reaction center. Several groups of animals
What You Need (song) What You Need (song) "What You Need" is a song recorded by the Australian band INXS. It is the leadoff track from their 1985 album, "Listen Like Thieves". "What You Need" was the first single off the album in Australia and New Zealand, while it was in USA and Europe the second single after "This Time" and was the band's first American Top Ten hit, peaking at #5 on the "Billboard" Hot 100 singles chart. After the album "Listen Like Thieves" was recorded and ready to be given to the record label for inspection, producer Chris Thomas was worried that