A number of hypotheses have been used to explain how free oxygen first accumulated in Earth’s atmosphere some 2.4 billion years ago, but a full understanding has proven elusive. Now a new model offers ...

The search for Earth 2.0 has begun in earnest. But there's a huge variety of exoplanets out there, so narrowing down the search to focus valuable telescope time on only the best candidates is critical ...

Chinese scientists have constructed a numerical model to simulate the Martian atmosphere and thus assist the country's plans to collect rock samples from the Red Planet. The model replicates the ...