July 2011
57 posts
June 2011
51 posts
Crows remember the faces of threatening humans and often react by scolding and bringing in others to mob the perceived miscreant, according to a new study published in the latest Proceedings of the Royal Society B.
Since the mob members also then indirectly learn about the threatening person, the findings demonstrate how just a single crow’s bad experience with a particular human can spread information about this individual throughout entire crow communities.
Scientists have developed a technique that could be used to deliver precise doses of hormones to people who don’t make them naturally.
To do this, they rewired kidney cells with light-sensitive molecules from the eye, they reported in the journal Science.
When pulsed with blue light, these cells churned out proteins on demand.
Ultimately, this technique could avoid the need for people with diabetes to inject themselves regularly.