How many of your friends can see all the dots in this optical illusion? Probably none.

Your brain literally won't let you win against this optical illusion:

There are 12 black dots in the picture, but I'd bet good money that you'll never be able to see all of them at once. If I squint, I can get four, and only four.

The illusion started taking over the internet after game developer Will Kerslake shared it via Twitter, but the picture itself originally came from the Facebook page of Akiyoshi Kitaoka, a psychology professor in Kyoto, Japan. It appears to be a variation of Ninio's extinction illusion, which is a grid illusion that scientists use to explain a big scientific concept.


Why you can't see all 12 dots? Basically, we can blame evolution.

The back of our eyes are full of light-sensing nerve cells, all crowded together, waiting for stimulation. You might think that when something interesting happens, they'd all start shouting and firing off signals — a furious rush of noise. But that's not what happens.

Instead, excited nerve cells actually kind of "shush" their neighbor cells, a phenomenon called lateral inhibition. They do this because it helps the message get through — if only a few people are shouting, the signal is clearer.

The end result is that our visual contrast goes up, but at the cost of muting whatever we're not looking at.

Meanwhile, our brain tries to be helpful by filling in that incomplete information with whatever it guesses is there. And since most of this picture is grey lines, our brain just leaves out the black dots.

So you're not going crazy, I promise. There really are 12 dots, but our eyes and brains do weird stuff sometimes to help us focus and survive. And as for what it means if you can see more dots than someone else? Well, the science doesn't really tell us much. Maybe you just have a different level of lateral inhibition than them, or maybe your brain is better at filling in the gaps.

Little mind games like this remind us of the limits of our brains.

We often assume seeing is believing, but optical illusions help show that's not true. Scientists are now using optical illusions to study how we perceive the world, why we react to certain things, and why we make quick assumptions. Optical illusions can teach us about bigger subjects like schizophrenia or even racism!

And, if nothing else, they're kind of trippy and fun.

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Shopping sustainably is increasingly important given the severity of the climate crisis, but sometimes it's hard to know where to turn. Thankfully, Amazon is making it a little easier to browse thousands of products that have one or more of 19 sustainability certifications that help preserve the natural world.

The online retailer recently announced Climate Pledge Friendly, a program to make it easier for customers to discover and shop for more sustainable products. To determine the sustainability of a product, the program partnered with third-party certifications, including governmental agencies, nonprofits, and independent labs.

With a selection of items spanning grocery, household, fashion, beauty, and personal electronics, you'll be able to shop more sustainably not just for the holiday season, but throughout the year for your essentials, as well.

You can browse all of the Climate Pledge Friendly products here, labeled with an icon and which certification(s) they meet. To get you on your way to shopping more sustainably, we've rounded up eight of our favorite Climate Pledge Friendly-products that will make great gifts all year long.

Amazon

Jack Wolfskin Women's North York Coat

Give the gift of warmth and style with this coat, available in a variety of colors. Sustainability is built into all Jack Wolfskin products and each item comes with a code that lets you trace back to its origins and understand how it was made.

Bluesign: Bluesign products are responsibly manufactured by using safer chemicals and fewer resources, including less energy, in production.


Amazon

Amazon All-new Echo Dot (4th Gen)

For the tech-obsessed. This Alexa smart speaker, which comes in a sleek, compact design, lets you voice control your entertainment and your smart home as well as connect with others.

Reducing CO2: Products with this certification reduce their carbon footprint year after year. Certified by the Carbon Trust.


Amazon

Burt's Bees Family Jammies Matching Holiday Organic Cotton Pajamas

Get into the holiday spirit with these fun matching PJs for the whole family. Perfect for pictures that even Fido can get in on.

Global Organic Textile Standard: This certifies each step of the organic textile supply chain against strict ecological and social standards. Each product with this certification contains 95%-100% organic content.

Amazon

Naturistick 5-Pack Lip Balm Gift Set

With 100% natural ingredients that are gentle on ultra-sensitive lips, this gift is a great gift for the whole family.

Compact by Design (Certified by Amazon): Products with this certification are packaged without excess air and water, which reduces the carbon footprint of shipping and packaging.


Amazon

Arus Women's GOTS Certified Organic Cotton Hooded Full Length Turkish Bathrobe

For those who love to lounge around, this full-length organic cotton bathrobe is the way to go. Available in five different colors, it has comfortable cuffed sleeves, a hood, pockets, and adjustable belt.

Global Organic Textile Standard: This certifies each step of the organic textile supply chain against strict ecological and social standards. Each product with this certification contains 95%-100% organic content.

Amazon

L'Occitane Extra-Gentle Vegetable Based Soap

This luxe soap, made with moisturizing shea butter and scented with verbena, is perfect for the self-care obsessed.

Compact by Design (Certified by Amazon): Products with this certification are packaged without excess air and water, which reduces the carbon footprint of shipping and packaging.

Amazon

Goodthreads Men's Sweater-Knit Fleece Long-Sleeve Bomber

For the fashionable men in your life, this fashion-forward knit bomber is an excellent choice. The sweater material keeps it cozy and warm, while the bomber jacket-cut, zip front, and rib-trim neck make it look elevated.

Recycled Claim Standard 100: Products with this certification use materials made from at least 95% recycled content.

Amazon

All-new Fire TV Stick with Alexa Voice Remote

Make it even easier to access your favorite movies and shows this holiday season. The new Fire TV Stick lets you use your voice to search across apps. Plus it controls the power and volume on your TV, so you'll never need to leave the couch! Except for snacks.

Reducing CO2: Products with this certification reduce their carbon footprint year after year. Certified by the Carbon Trust.

Having lived in small towns and large cities in the Pacific Northwest, Southwest, and Midwest, and after spending a year traveling around the U.S. with my family, I've seen first-hand that Americans have much more in common than not. I've also gotten to experience some of the cultural differences, subtle and not-so-subtle, real and not-so-real, that exist in various parts of the country.

Some of those differences are being discussed in a viral thread on Twitter. Self-described "West coaster" Jordan Green kicked it off with an observation about East coasters being kind and West coasters being nice, which then prompted people to share their own social experiences in various regions around the country.

Green wrote:

"When I describe East Coast vs West Coast culture to my friends I often say 'The East Coast is kind but not nice, the West Coast is nice but not kind,' and East Coasters immediately get it. West Coasters get mad.

Niceness is saying 'I'm so sorry you're cold,' while kindness may be 'Ugh, you've said that five times, here's a sweater!' Kindness is addressing the need, regardless of tone.

I'm a West Coaster through and through—born and raised in San Francisco, moved to Portland for college, and now live in Seattle. We're nice, but we're not kind. We'll listen to your rant politely, smile, and then never speak to you again. We hit mute in real life. ALOT.

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If the past year has taught us nothing else, it's that sending love out into the world through selfless acts of kindness can have a positive ripple effect on people and communities. People all over the United States seemed to have gotten the message — 71% of those surveyed by the World Giving Index helped a stranger in need in 2020. A nonprofit survey found 90% helped others by running errands, calling, texting and sending care packages. Many people needed a boost last year in one way or another and obliging good neighbors heeded the call over and over again — and continue to make a positive impact through their actions in this new year.

Upworthy and P&G Good Everyday wanted to help keep kindness going strong, so they partnered up to create the Lead with Love Fund. The fund awards do-gooders in communities around the country with grants to help them continue on with their unique missions. Hundreds of nominations came pouring in and five winners were selected based on three criteria: the impact of action, uniqueness, and "Upworthy-ness" of their story.

Here's a look at the five winners:

Edith Ornelas, co-creator of Mariposas Collective in Memphis, Tenn.

Edith Ornelas has a deep-rooted connection to the asylum-seeking immigrant families she brings food and supplies to families in Memphis, Tenn. She was born in Jalisco, Mexico, and immigrated to the United States when she was 7 years old with her parents and sister. Edith grew up in Chicago, then moved to Memphis in 2016, where she quickly realized how few community programs existed for immigrants. Two years later, she helped create Mariposas Collective, which initially aimed to help families who had just been released from detention centers and were seeking asylum. The collective started out small but has since grown to approximately 400 volunteers.