Medical use of marijuana is fully legal in 28 states, with another 17 states allowing limited use in specified cases. But policy has outpaced research and investigation into cannabis’s effects on the brain — both positive and negative.
While scientists have not yet made changes to human reproductive cells that can be passed down through generations, the most recent breakthrough in gene editing technology — CRISPR-Cas9 — has brought us to the brink of this possibility.
Physicists are trying to find an elusive new type of particle called sterile neutrinos. But it's hard, because the particles only interact with other matter through gravitational force, the weakest of all known forces: Since their masses would be so tiny, their gravitational effects would be impossible to observe.
Tiny brains made cookie-cutter style could speed discoveries and complement — or some say, replace — mouse models now routinely used in laboratory research on neurological diseases such as Parkinson’s and Alzheimer’s.
Taking lessons from the 2014 Ebola crisis, global health officials must increase engagement among countries and communities to better address emerging epidemics such as Zika, public health experts say.