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He figured out a way to bring clean, affordable power to people who were off the grid.

A young technician is lighting up the lives of those who don't have electricity.

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Imagine what the world would look like if industrialized countries had skipped the age of fossil fuels and gone directly to solar power.

Our infrastructure, way of life, and environment would be radically different.


Image via iStock.

That’s the future 23-year-old entrepreneur George Mtemahanji envisions for his home country of Tanzania.

Image via SunSweet Solar, used with permission.

Of the more than 51 million people living in Tanzania, 70% don't have electricityat all, either because they’re not connected to the energy grid, or, if they are, they still don't have electricity due to poor connections and frequent outages.

Mtemahanji knows firsthand what it's like to live without electricity.

He grew up studying by kerosene light and going to bed at 8 p.m. (the sun goes down in Tanzania at 6 pm).

"I understand very well the discomfort that people who have no electricity have," he told Upworthy via email. "I was born at night in a clinic without electricity, and so I was born with the light of the moon. My mom always told me that she had to wait [until] the next day to see me, she knew I was born healthy because I weighed nearly 4kg, but she could only see me the next morning. ...I was born and I lived without electricity and I know what it means, for this I decided to use all my knowledge to light up the lives of all those who do not have electricity."

In 2003, Mtemahanji moved to Italy with his mother and became a technician in renewable energy before going to work in Switzerland. By 2014, he’d saved up enough to return to Tanzania, where he started a business with a friend, Manuel Rolando.

The business they started is called SunSweet Solar Limited, and it has the potential to solve three major problems at the same time.

Solar power seemed to Mtemahanji and Rolando like the perfect way to resolve a few different problems simultaneously — (1) bringing electricity to people who needed it, (2) in areas that were mostly poor, and (3) without contributing to climate change.

SunSweet Solar designs, plans, and constructs solar photovoltaic systems, water pumping systems, street light systems, and off-grid lighting.

Image via SunSweet Solar, used with permission.

SunSweet Solar's first contract involved installing a solar power plant at a secondary school that could run 236 lights, dozens of computers, and fans.

The project was challenging, but it was also a success, and Mtemahanji was curious to see how having electricity affected the students.

He wasn't disappointed; he says that since SunSweet Solar's installation last year, national exam performance at Benignis Girls Secondary School increased from 81% to 94%.

Mtemahanji attributes at least some of that success to the introduction of electricity.

"This result shows that studying in a serene environment where electricity is always present, can help a lot to improve the quality of education."

In addition to big projects like the Benignis school, the company sells solar kits and installs larger scale solar systems.

The plan originally was to sell solar kits capable of powering a few lightbulbs and charging a phone to individual households, but SweetSun Solar has since changed its model: nNow they install single solar systems that can satisfy the energy demands of a whole village.

Image via SunSweet Solar, used with permission.

SunSweet Solar customers pay for the solar setup in installments through their phones, and it costs them about $0.13 a day. The government of the village earns 5% of the revenue to assist in the development of the village.

Image via SunSweet Solar, used with permission.

In October 2015, SunSweet Solar was selected as one of the 12 best companies led by young Africans‎ by the Anzisha Prize, an award celebrating young African entrepreneurs.

Since the award, sales have skyrocketed, and SunSweet Solar now faces a new challenge: how to keep up with demand. The company gets requests from about four villages every month, each village with an average of 30 customers/houses. Mtemahanji and Rolando are currently looking for investors so that they can scale up their business.

Mtemahanji says it can be discouraging because it seems like many investors want to work with Western and Asian companies operating in Africa rather than directly with Africans.

"We must be content with the funds that we can have through the seed and prizes. But many of these funds help to support the company, not to scale up. I am confident, however, that this situation will change soon as possible, and we are ready for that moment."

Tony Trapani discovers a letter his wife hid from him since 1959.

Tony Trapani and his wife were married for 50 years despite the heartache of being unable to have children. "She wanted children,” Trapani told Fox 17. "She couldn't have any. She tried and tried." Even though they endured the pain of infertility, Tony's love for his wife never wavered and he cherished every moment they spent together.

After his wife passed away when Tony was 81 years old, he undertook the heartbreaking task of sorting out all of her belongings. That’s when he stumbled upon a carefully concealed letter in a filing cabinet hidden for over half a century.

The letter was addressed to Tony and dated March 1959, but this was the first time he had seen it. His wife must have opened it, read it and hid it from him. The letter came from Shirley Childress, a woman Tony had once been close with before his marriage. She reached out, reminiscing about their past and revealing a secret that would change Tony's world forever.

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Photo by Bambi Corro on Unsplash

Can flying to college twice a week really be cheaper than renting?

Some students choose to live at home while they go to college to save money on living expenses, but that's generally only an option for families who live in college towns or cities with large universities where a student can easily commute.

For University of British Columbia student Tim Chen, that "easy commute" is more than 400 miles each way.

Twice a week, Chen hops on a flight from his home city of Calgary, flies a little more than an hour to Vancouver to attend his classes, then flies back home the same night. And though it's hard to believe, this routine actually saves him approximately $1,000 a month.

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Family

Dad takes 7-week paternity leave after his second child is born and is stunned by the results

"These past seven weeks really opened up my eyes on how the household has actually ran, and 110% of that is because of my wife."

@ustheremingtons/TikTok

There's a lot to be gleaned from this.

Participating in paternity leave offers fathers so much more than an opportunity to bond with their new kids. It also allows them to help around the house and take on domestic responsibilities that many new mothers have to face alone…while also tending to a newborn.

All in all, it enables couples to handle the daunting new chapter as a team, making it less stressful on both parties. Or at least equally stressful on both parties. Democracy!

TikTok creator and dad Caleb Remington, from the popular account @ustheremingtons, confesses that for baby number one, he wasn’t able to take a “single day of paternity leave.”

This time around, for baby number two, Remington had the privilege of taking seven weeks off (to be clear—his employer offered four weeks, and he used an additional three weeks of PTO).

The time off changed Remington’s entire outlook on parenting, and his insights are something all parents could probably use.

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Internet

Man goes out of his way to leave tip for a server after realizing he grabbed the wrong receipt

Instead of just brushing it off and moving on, the man wrote out a note explaining what happened with a sincere apology along with a $20 cash tip and delivered it to the restaurant.

Man goes out of his way to leave forgotten tip for server

Being in the service industry can be hard. People have to spend long hours on their feet, deal with repetitive movements that can create pain and sometimes interact with not so nice customers. When you rely on tips for survival on top of everything else, it can feel like a bit of a gut punch when someone decides not to leave you one despite how good your service was.

One customer must've realized the disappointment that can occur after not receiving a tip when serving tables because he went out of his way to give one. In a post shared on Reddit, a customer revealed in a letter that he realized he took the wrong receipt after leaving. Instead of taking the blank one, he took the merchant's copy which holds the tip amount and his signature.

The error was discovered when he was checking his bank account and saw the amount taken off of his card was not the amount he expected. That's when he decided to check the receipt from that day and saw the error.

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Science

Scientists have finally figured out how whales are able to 'sing' underwater

The physical mechanism they use has been a mystery until now.

Baleen whales include blue, humpback, gray, fin, sei, minke whales and more.

We've long known that baleen whales sing underwater and that males sing in tropical waters to attract females for mating. What we haven't known is how they're able to do it.

When humans make sound underwater, we expel air over through our vocal chords and the air we release rises to the surface as bubbles. But baleen whales don't have vocal chords, and they don't create bubbles when they vocalize. Toothed whales, such as sperm whales, beaked whales, dolphins and porpoises, have an organ in their nasal passages that allows them to vocalize, but baleen whales such as humpback, gray and blue whales don't.

Whales are notoriously difficult to study because of their size and the environment they require, which is why the mechanism behind whale song has remained a mystery for so long. It's not like scientists can just pluck a whale out of the ocean and stick it in an x-ray machine while it's singing to see what's happening inside its body to create the sound. Scientists had theories, but no one really knew how baleen whales sing.

Now, thanks to researchers at the University of Denmark, that mystery has been solved.

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You can learn a lot by alayzing faces.

There are countless situations in life where we have to figure out how someone really feels, but they have a good poker face that keeps their feelings well-hidden. According to body language expert Terry Vaughan even the most deceptive people in the world have a tell: the left and right sides of their face don’t usually match.

So, which side do we believe? Vaughan says the left.

“The reason this is a powerful hack is because the left side of the face is more likely to reveal the ‘true emotion’ or the ‘dominant’ emotion if there’s a mix,” Vaughan says. The reason? “The right hemisphere of our brain does more heavy lifting in dealing with processing emotions. The left hemisphere…is a little more analytical or ‘strategic.’”

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