Ecology
2Under the sign of "eco": which cities care most about the environment
They took into account the level of air pollution, the amount of green spaces, the use of renewable energy, and other criteria.
9Scientists discover 'killer' that caused two mass extinctions on Earth: it still threatens humans
Mass extinctions occurred at intervals of 3 million years
2Scientists catastrophically miscalculated glacial melting: warning from the past released
Forecasts turned out to be at least 20 times lower than the actual rate
9Discovery that scared scientists on a remote island with almost no people
Remote from civilisation, Trindadi Island has become a haven for many species of animals
