The vasculature can influence neural stem cell proliferation and differentiation by providing a local source of signaling molecules secreted from endothelial cells (1) as well as by delivering systemic regulatory factors (2). (scienceintheclassroom.org)
What's likely true is the sources of all signals are getting more and more algorithmic scrutiny, and end users play a larger role in this process in many ways. (ericward.com)
Assuming they find enough of them, the team can use these particles to rule out charm mesons as a source of the signal. (newscientist.com)