Fossils reveal Earth's climate from half billion years ago
Researchers have investigated Earth's climate over half a billion years ago by combining climate models and chemical analyses of fossilised remains about 1 millimetre long from the first animals to produce shells. Analyses of the oxygen isotopes of these fossils found in the UK suggested temperatures between 20Â°C and 25Â°C for high latitude seas, suggesting a 'typical' greenhouse state.