When we think of planets with rings, Saturn often comes to mind. However, new research suggests that Earth might have had its ...
To reach that surprisingly conclusion, scientists studied the positions of 21 asteroid impact craters during the Ordovician period – the second of six periods in the ...
The ozone layer is a layer in Earth's atmosphere that absorbs most of the Sun's UV radiation. It contains relatively high concentrations of ozone, although it is still very small with regard to ...