Subscription Center
The California Institute for Regenerative Medicine is rethinking its rules in the wake of a recent breakthrough involving the creation of stem cell lines from a cloned human embryo
The breakthrough might set up another showdown about cloning for therapeutic purposes
Celltex Therapeutics of Houston ceased treatment patients in the U.S. last year after a warning from regulators, and will now send patients for treatments to Mexico
An ambitious researcher wrestles with some of the grand challenges of neural development
Mitochondrial transfer technology to shuffle genetic material between unfertilized eggs could help reduce the risk of childhood diseases
Scientists have coaxed induced stem cells to form functional liverlike tissue in a petri dish
Scans allow a researcher to communicate with people previously written off as unreachable and offer hope in identifying those who might respond to rehabilitation
The achievement, with an "optic cup" that contains multiple layers of photoreceptors, raises hopes for repairs of damaged eyes in the clinic
Chaos and bureaucracy hamper assessment of nuclear crisis
See what we're tweeting about
Deadline: Jul 30 2013
Reward: $100,000 USD
The Seeker desires a method for producing pseudoephedrine products in such a way that it will be extremely difficult for clandestine che
Deadline: Jul 14 2013
Reward: $1,000,000 USD
This is a Reduction-to-Practice Challenge that requires written documentation and&
Powered By: 
YES! Send me a free issue of Scientific American with no obligation to continue the subscription. If I like it, I will be billed for the one-year subscription.
