But scientists are finding ways around this obstacle with new research that could make solar energy more efficient and more cost - effective. (scientificamerican.com)
He believes they may be able to get around this obstacle with advances in generating stem cells from patient cells that have already developed into a specific type of tissue, such as skin. (salk.edu)
They will have to slow down long enough to navigate around the obstacles which improve digestion and protect them from choking and other problems. (thoroughlyreviewed.com)