NASA Discovers Microbe that Thrives on Toxic Arsenic

NASA has discovered a bacteria that can use arsenic -- which is toxic to most forms of life -- as a building block of its DNA. Scientists say the discovery may broaden our definition of what constitutes life and may revolutionize how we search for life beyond Earth.

Phosphorus a food supply time bomb?

Without phosphorus, plants and animals couldn't function, so I find it troubling to read that production of the element is projected to peak in 2035,...