Maybe the first life on Earth was part of an 'RNA world.' Artur Plawgo/Science Photo Library via Getty Images How life on Earth started has puzzled scientists for a long time. And it still does.

Scientists have estimated how many cells have occupied Earth since the origin of life on the planet. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

Billions of years of evolution have made modern cells incredibly complex. Inside cells are small compartments called organelles that perform specific functions essential for the cell’s survival and ...

Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. The exact sequence of events behind eukaryogenesis is ...

Inside the Destiny laboratory module aboard the International Space Station, NASA flight engineer Zena Cardman recently ...

Illustration of a healthy cell (left) alongside a cell that has been affected by necrosis (right). The process of necrosis, a form of cell death, may represent one of the most promising ways to change ...

Microgravity is known to alter the muscles, bones, the immune system and cogni tion, but little is known about its specific impact on the brain. To discover how brain cells respond to microgravity, ...