The female chooses. Peregrines generally mate for life, returning each year to the same area and even the same nest. However, the female will accept a new mate if the first is killed. There’s ...

life has a disproportionate affect on Earth's carbon cycle." Another aspect of the research is what is says about the absolute limits of life on Earth in terms of temperature, pressure ...

Emerging evidence suggests that plate tectonics, or the recycling of Earth's crust, may have begun much earlier than ...

All organisms on Earth ride upon a "ferrous wheel" made of different forms of iron that are essential for life. Aa Aa Aa Biogeochemical cycles describe pathways by which chemical elements move ...