• This injectable gel reversed paralysis in mice. Humans could be next. Daily Beast.
• Water chlorination has cut mortality rates for children under five in certain Kenyan villages by 63%. Vox.
• Cancer deaths in U.S. fall overall by 27% over last 50 years. UPI.
• Presumed extinct, the tentacled butterfly ray comes back from the dead. Hakai.
• Airless puncture-proof tires may be on your car by 2024. Big Think.
• Beavers return to Nottinghamshire for first time in 400 years. BBC.

For more good news, check out The Progress Network, Future Crunch, and Reasons to be Cheerful.