Thanks for stopping by for Day 11 of Upworthy's 31 Days of Happiness Countdown! If this is your first visit, here's the gist: Each day between Dec. 1 and Dec. 31, we're sharing stories we hope will bring joy, smiles, and laughter into our lives and yours. It's been a challenging year for a lot of us, so why not end it on a high note with a bit of happiness? Check back tomorrow (or click the links at the bottom) for another installment!

You might think that "Sesame Street" is only for young children and their parents. You would be wrong.


Everyone's favorite muppet crew recently came out with a silly parody of "Stranger Things" (the Netflix hit that follows a small town being terrorized by a malevolent monster from the underworld), and you need to check it out. Yes, you. I don't care if you're 30 years old watching it by yourself on a Friday night with a glass of wine. The wacky fun and life lessons in this parody transcend age and life status!

It's called "Sharing Things" and is about as adorable as you would expect. (That is to say very).

In the six-minute-long skit, the Cookiegorgon (Cookie Monster, duh) has eaten all the food in his realm — known as the Snackside Down. So, disguised as a kid trick-or-treating on Halloween, he runs amok in "Sesame Street" world eating everything in sight.

Leave it to Ernie and the gang, who play the "Stranger Things" kids, to teach the Cookiegorgon a simple but important lesson. You're going to get a delightful kick out of who (or what) shows up to save the day in the end.

Come for the sick '80s score, stay to watch Cookie Monster's cold, greedy heart melt — not unlike the morsels of chocolate in a homemade cookie.

After all, sometimes adults need a little reminder about sharing too.

(Warning: Extremely, extremely mild spoilers for "Stranger Things" ahead.)

More days of happiness here: DAY 1 / DAY 2 / DAY 3 / DAY 4 / DAY 5 / DAY 6 / DAY 7 / DAY 8 / DAY 9 / DAY 10 / [DAY 11] / DAY 12 / DAY 13 / DAY 14 / DAY 15 / DAY 16 / DAY 17 / DAY 18 / DAY 19 / DAY 20 / DAY 21 / DAY 22 / DAY 23 / DAY 24 / DAY 25 / DAY 26 / DAY 27 / DAY 28 / DAY 29 / DAY 30 / DAY 31
via LeapsMag / Instagram

Researchers at the University of Houston have developed a filtration system that can instantly neutralize and kill 99.8% of the coronavirus after a single pass through.

"It's basically a high-performance COVID-19 killer," Dr. Garrett Peel of Medistar, who helped craft the design, said according to Fox News.

The filter looks to be an important tool in fighting a virus that can remain in the air for hours and, in turn, spread more readily than viruses like the common flu. Harvard Health says that aerosolized coronavirus can remain in the air for up to three hours.

People who are asymptomatic can easily spread it to multiple people when they talk, breathe, cough, or sneeze.

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