2 . A shark that walks in water instead of swimming might sound like a creature straight out of a science fiction thriller. However, that is precisely how the four new species of the fish-found in the tropical waters of Northern Australia-move across the seafloor. The unique ocean animals were discovered by a team of scientists, led by Dr Christine Dudgeon from Australians University of Queensland, during a 12-year-old global conservation study.

The newly-found sharks have all evolved to survive in low oxygen environments, enabling them to hunt during low tides. The researchers believe their ability to use their fins to walk across the water affords the sharks substantial advantage over the unsuspecting smaller animals they prey on .

“Though they are super hunters in their shallow habitat, the tiny sharks are harmless to humans," says Dudgeon. "At less than a meter long on average, walking sharks present no threat to people. They're incredibly cute little animals and are really more like gecko than a shark.”

A DNA analysis of skin samples from the sharks suggests that walking sharks broke away from their brothers and sisters about nine million years ago and became a distinct species. Though that may appear to be a long time ago, it is relatively recent given that sharks have been around for more than 400 million years. In fact, Dudgeon and her team believe walking sharks are the youngest kind of sharks on Earth!

The researchers, who published their findings in The Marine and Freshwater Research journal on January 21, 2020, say that the sharks' small numbers and shallow habitat make them extremely vulnerable to natural disasters and overfishing. Three of the nine walking shark species , all of which live in the waters off Northern Australia, eastern Indonesia, and near the island of New Guinea, are currently on the International Union for Conservation of Nature Red List, which lists species at risk. Dudgeon and her team believe sensible conservation management plans are urgently needed to protect the walking sharks and other endangered animals from further threats.

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7 . While known for its Pacific Ocean beaches and fashionable coastal towns, the Golden State is also home to many new and clean lakes where visitors can soak up the sun and cool off.

Shasta Lake

Shasta Lake is the largest reservoir in California at 30. 000 acres wide. The Lake is in Northern California and is a three and a half-hour drive from Los Angeles. With 370 miles of shoreline,   it's no surprise that renting a houseboat is a popular activity. Depending on their location ,   visitors can enjoy the view of Mt. Shasta, which has snow on its peak year-round.

Big Bear Lake

Big Bear Lake is another great option for those wanting to take a day trip from Los Angeles. It takes only two hours to drive there from downtown Los Angeles. Animal lovers can stop by the Big Bear Alpine Zoo to get an up-close look at the lake's namesake (同名物). The lake also has many hiking and biking trails,   along with plenty of fishing spots.

Lake Havasu

Lake Havasu is divided along the border of California and Arizona and is an oasis (绿洲)in the desert. It's a five-hour drive from Los Angeles and a two and a half hour drive from Las Vegas. Visitors can fish or go boating on the lake that was formed from the Colorado River.

Mono Lake

Mono Lake is located in the Sierra Nevada mountains and spans more than 70 miles. It's a five-hour drive from either Los Angeles or San Francisco. Visitors into fishing should head to a different lake because this body of water does not have any fish. It's a salty lake, which means that it's filled with saltwater and is two to three times saltier than the ocean.

8 . Every woman dreams of receiving a huge, sparkling and priceless diamond. Now scientists have discovered the largest diamond in the universe.

But it’s well beyond the reach of the most lovestruck men — 50 light years to be precise. Space scientists revealed that they had discovered a ten billion trillion trillion carat gem. Measuring 2,500 miles across and weighing five million trillion trillion pounds, the rock was found on Valentine's Day buried in the core of a white dwarf star in the constellation Centaurus.

“It’s the mother of all diamonds,” said Travis Metcalfe, who led the team of researchers at the Harvard-Smithsonian Centre for Astrophysics in America.

“You would need a jeweller’s loupe the size of the Sun to grade this diamond.” Named Lucy, after the Beatles' song Lucy in the Sky with Diamonds, the rock has sent a ripple of excitement through the scientific world.

The largest diamond found on earth was the 3,106-carat Cullinan. It was cut into nine major stones, including the 530-carat Star of Africa, now a part of the Crown Jewels. Diamonds were first discovered in India more than 2,800 years ago. The Ancient Romans believed that the stones were splinters of stars that had tumbled to earth.

In Ancient Egypt, diamonds were symbols of eternity and were used in funeral rites. In the Middle Ages, men wore them to symbolize their courage and virility. The tradition of giving them as love tokens dates from 1477, when Archduke Maximilian of Austria gave a diamond ring to Mary of Burgundy.

9 . Many people wake up in the morning and watch their mobile phones first and then they watch their mobile phones last before they go to bed. Our mobile phones are never far away from us. Data show that we watch them every 12 minutes on average. Since we are bound to be inseparable from mobile phones, we should obey the relative “cell phone manners”. The following five things are best avoided.

An absolute no-no for most (81%) of us. Yet half of us have been with others who've done it. And more than a quarter of young adults admit to it.

Even looking at the screen at the dinner table is not acceptable — for some. More than four in five people aged 55and over think it's unacceptable to check messages, compared with around half (46%) of 18 to 34-year-olds.

Three-quarters (76%) of us object to watching videos and playing video games loudly on public transport, as well as listening to music, but it doesn't stop us doing it.

You’re at the cashiers but on the phone mid-conversation. Do you hang up, say a polite “hello” and pack away your bread and goods — or chat on regardless?

It's a source of frustration for many a shop worker, receptionist and waiter. One hotels checkout worker was so annoyed when a customer refused to end her call that she refused to serve her.

They are always getting their head down, eyes fixed on the screen — and they're right in your path. Twitter user @tiredhorizon has a public warning for them. Put away your phones in public buildings, hospitals and near reversing lorries.

Four 10 (41%) adults think is unacceptable to use a phone while seated with he family on the sofa in front of TV.

For the older generation (those over 55) it's more of an issue — 62% object to it — than for younger adults — only one in five are against it.

10 . When Jaimeson Pleasants was born, the delivery room turned into chaos. Now 20, Jaimeson, who was born without cheekbones, a jaw, and parts of both ears, has Treacher Collins syndrome (特雷彻·柯林斯综合症), a condition that affects facial development. His facial differences badly affected him — mainly, in relation to bullying. Jaimeson reveals that he dealt with some pretty serious bullying growing up, and often felt isolated or like he didn’t fully belong.

Luckily, Jaimeson has his brother, Anderson, by his side. And that’s all thanks to a phone call their mother Lisa got when Jaimeson was just 2 years old. One day, Lisa got a call from an adoption agency. They told her they had a newborn baby they thought also had TCS, and wondered if Lisa would be interested in adding him to her family. She said yes.

Anderson quickly bonded with Jaimeson over their shared struggles. But Lisa began to suspect that Anderson didn’t actually have TCS, so she brought both kids to a doctor to get a better diagnosis. It turned   out Lisa was right — Anderson was diagnosed with Goldenhar syndrome (唐氏综合征), a similar condition that affects Anderson’s face, as well as his lungs, neck, and spine (脊柱).

Regardless of their health struggles, Jaimeson and Anderson are a team. They understand each other better than anyone, and they’ll head to college together soon. Although adopting a second child with a serious health condition was likely a risk for Lisa, there’s no doubt that it worked out for the best.