electricty
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Puerto Rico is slowly recovering from an island-wide blackout
More than 435,000 customers still lack electricity and it's not clear when service will be fully restored.
Researchers discover climate-friendly way of extracting hydrogen from oil
Scientists have discovered a way to extract hydrogen from oil without releasing greenhouse gases -- a move they've hailed as a "silver bullet" for climate issues. Hydrogen is already used by some car manufacturers to power vehicles and is also burned to generate electricity. However, most of this hydrogen comes from natural gas, which involves producing planet-warming methane during the extraction process. The large-scale roll-out of hydrogen tech has also been restricted because of the high costs involved in separating it from hydrocarbons.
Electronic implant helps paralyzed people walk again
People paralyzed because of spinal cord injuries could one day be able to walk again, thanks to an implant that helps send "lost signals" from the brain to leg muscles. In Nature Medicine and the New England Journal of Medicine, research teams report that several patients -- all paralyzed from the waist down -- have been able to walk again after having the electrical patch fitted to their spinal cords. The approach is called epidural stimulation.
