Hello there! We hope you took some time to relax over the holiday weekend before getting back into the swing of things this week. Are you ready for your latest dose of positivity? Today we’re sharing some stories highlighting progress and hope — like the exciting news that the world’s clearest large lake could get even clearer and how these incredible drone-delivered defibrillators can save lives in mere minutes. Learn about the deaf-owned restaurants that are helping to create community (and serve up great food) around the world, and meet the inspirational NFL player-turned-neurosurgeon who took the term “brains and brawn” to a whole new level.

Exploring and Living / Shutterstock

Environment

Lake Tahoe Could Become Clearer Due to Changing Plankton Populations

Lake Tahoe, which Mark Twain called “the fairest picture the whole earth affords,” is famous for its stunning crystalline waters. And in the next few years, scientists say, the world’s clearest large lake could become even clearer due to changes in its ecosystem.

Why It’s Crystal Clear