A green sea slug appears to be part animal, part plant, as it's the first critter discovered to produce the plant pigment chlorophyll.
Photosynthesis allows plants, algae and certain bacteria to turn sunlight into chemical energy. The amazing feat is achieved because sunlight can fuel a reaction between water and carbon dioxide that, in turn, produces carbohydrates (simple sugars) and oxygen. Here is the latest news on photosynthesis, including the oldest evidence of it on Earth and how blocking photosynthesis on a large scale can affect food chains.
The planet might once have been dominated by microbes that used a molecule other than chlorophyll to harness Sunâ€™s rays.
The planet has endured far more dramatic climate change in the past fueled by other forms of life. But rarely if ever has the change been so rapid.
A decade worth of satellite imaging data has shown for the first time that global warming could devastate marine life, scientists announced today.
They work the night shift, let their roots die, and fend off thirsty predators to conserve every precious drop.
If the history of life could be rewound and replayed, many of the same innovations would reappear. Whatâ€™s that mean for life on other planets?