Quantcast

Latest Helena Mira Stories

87d5e427ae2817c00aa02d8b91ff21ce
2010-07-02 08:11:47

Scientists have identified the signal that prevents stem cells from proliferating, protecting the brain against too much cell division and ensuring a pool of neural stem cells that lasts a lifetime.


Word of the Day
upstander
  • A person who stands up for something, as contrasted to a bystander who remains inactive.
  • One of the upright handlebars on a traditional Inuit sled.
The word 'upstander' in the first sense here is a play on the word 'bystander' and the idea of 'standing up' for something.