Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

A 3D rendering showing the internal structure of an animal cell, with several round or wavy structures inside a border. It turns out that the redox state of a cell, such as the animal cell shown, is ...

The discovery that tissues use electricity to expel unhealthy cells is part of a surge of renewed interest in the currents flowing through our bodies. We’re used to thinking of the brain as an ...

Many people assume that men prefer women with large breasts. Researchers have attempted to justify this belief with the concept of “reproductive readiness,” the idea that evolution has shaped men to ...

What keeps our cells the right size? Scientists have long puzzled over this fundamental question, since cells that are too large or too small are linked to many diseases. Until now, the genetic basis ...

Why cells grow to just the right size has long baffled scientists. Too small or too large, and cells can trigger serious diseases, but the genetic switch behind this balance has remained elusive. Now, ...

The robots, each the size of a single cell, casually turn circles in a bath of water. Suddenly, their sensors detect a change: Parts of the bath are heating up. The microrobots halt their twirls and ...

What keeps our cells the right size? Scientists have long puzzled over this fundamental question, since cells that are too large or too small are linked to many diseases. Until now, the genetic basis ...

In a new TikTok video, the athlete also revealed why her recovery was "rough" VALERIE MACON/AFP via Getty; Simone Biles/TikTok Simone Biles broke down the details of her recent breast augmentation in ...

Cells are the basic unit of life and come in many different sizes and shapes. In animals, cell size is exquisitely matched to cell function: the smallest cells (such as red blood cells and sperm) shed ...