Origins of life

Evidence from Southwestern deserts suggests that oxygen-breathing organisms arose on land rather than in the seas.

Scientists have discovered building blocks similar to those in modern RNA that can effortlessly assemble when mixed in water and heated.

An MIT physicist has proposed the provocative idea that life exists because the law of increasing entropy drives matter to acquire lifelike physical properties.

Symbiotic bacteria that dwell within insect cells are intricately intertwined with their hosts, prompting scientists to question when these bacteria stop being bona fide organisms and become part of the cell.