Bones are not merely structural supports but also function as endocrine organs. In 2007, Gerard Karsenty and his team showed that bones secrete hormones like osteocalcin, which regulates blood sugar, fat deposition, and male fertility.

The human brain has approximately 86 billion neurons, a number refined in 2009 by neuroscientist Suzana Herculano-Houzel, correcting the long-held estimate of 100 billion.

Suzana Herculano-Houzel

The sense of 'itch' (pruritus) is distinct from pain and is mediated by specific nerve fibers (C-fibers) and receptors, a distinction that was scientifically confirmed in the 21st ...

Humans can distinguish about one trillion different scents, a figure published in a 2014 study by Bushdid et al., dramatically higher than the previous estimate of only 10,000 scen...

Andreas Keller, Leslie B. Vosshall (Bushdid et al.)