Daviduk Top

26/11/2021

Some countries are hundreds of years old, while others can trace their nation's history back for thousands of years. But South Sudan in North Africa just gained its independence from Sudan in 2011, which currently makes it the youngest country in the world.

11/10/2021

Because of pollution, the Earth's ozone layer has suffered a lot. That's bad news for everyone, since the fragile gas layer protects our planet and shields us from the sun's harmful ultraviolet rays. Fortunately, climate change experts believe that the ozone layer will fully heal within 50 years, according to a 2018 report from the United Nations.

The recovery is thanks in large part to the Montreal Protocol of 1987, which put a global ban on the use of one of the main culprits for the damage: chlorofluorocarbons (CFOs). Previously, CFOs had been common in refrigerators, aerosol cans, and dry-cleaning chemicals.

19/08/2021

Dentistry goes all way back to when humans first had teeth…well not quite that long. However, one study found evidence of teeth being drilled in skulls that dates from 7,500 to 9,000 years ago. The holes were likely made using a prehistoric bow-drill. Could that be the work of the first dentist? Other biting research conducted by the University of Bologna, Italy on a 14,000-year-old skull found that "one rotten tooth in the jaw had been deliberately scoured and scraped with a tool," according to the BBC. That makes dentistry one of the oldest recorded professions and is definitely a reason to smile.

19/08/2021

Around 80 percent of Greenland is covered by the Greenland Ice Sheet, which Britannica explains is the "largest and possibly the only relic of the Pleistocene glaciations in the Northern Hemisphere." But has it always been so icy? Well, at the bottom of a 1.4 km core sample, which was taken in 1966 at Camp Century during the Cold War, researchers found "well-preserved fossil plants and biomolecules," which means that the massive sheet melted and reformed at least once in the last million years. Brrrrr!

18/08/2021

Castroville is a rural town in California that grows a lot of artichokes (and other vegetable crops), thanks to the fact that the area enjoys ideal weather year round. Because of this, it grows 99.9% of all commercially grown artichokes and has even been nicknamed the "Artichoke Capital of the World."

18/08/2021

Although the majority of the human population is currently under 30 years old, there are still plenty of older folks among us. In fact, over 12% of people on Earth are 60 years old and older. That number is expected to reach 22% by 2050.

17/08/2021

If the Earth's time zones were each one hour apart, then we would have 24 times zones, which sounds pretty straightforward. However, the situation is a little more complicated than that. Since many time zones only differ by 30 or 45 minutes, they don't fit into a neat and tidy 24-hour span, which means that there are more than 24, though it's hard to say exactly how many.

17/08/2021

The 1933 Double Eagle was a $20 U.S. coin made of gold that never went into circulation. A few of the coins were made, but most were destroyed—save for nine that were presumed stolen by U.S. mint workers. After years circulating the globe and falling into the hands of a few notable owners—including the king of Egypt—one of the coins was auctioned off at Sotheby's in 2002 for a stunning $7,590,020. That made it the most expensive coin ever sold at auction.

16/08/2021

The panda at your local zoo may look like it's at home in its cozy sanctuary. But unless you live in China, the pandas that you're seeing are just visiting. That's because every one of the gentle giants in zoos around the world are on loan from China. Yes, they're technically the property of the government of China, according to Vox.

16/08/2021