The impact of land plants on Earth’s climate and oxygenation state

It is now evident that humans impact the climate by increasing the level of greenhouse gasses in the atmosphere. In the scientific literature, it has long been accepted that the emergence of plants on land did the opposite: cooled the Earth. By use of a new global ocean oxygenation proxy, Dahl et al. 2010 showed … Read More

Oxygenation of the Earth’s oceans

Animals evolved on our planet 3,500 million years after the origin of microbial life forms. Thus, we present a rare form of life that is not representative of life in the Universe. Why did complex organisms evolve so late in Earth’s history? Something seems to have triggered evolution towards intelligent life forms. Could this ‘something’ be … Read More