A glass of wine vibrates at a regular frequency, and a high musical note can break such a glass. The frequency of the musical note must be equivalent to the natural frequency of the glass. Because the frequencies of the note and the glass are the same, the energy is transferred to the glass, which vibrates so violently that it shatters. The phenomenon is known as resonance. The technique can be used to improve the sound of some musical instruments.

Several reports of ghostly appearances and eerie sounds have been made at the United States' most famous address – and that doesn't even include election years! Abraham Lincoln is the most frequently seen ghost, having been seen by First Lady Eleanor Roosevelt, Queen Wilhelmina of the Netherlands, and Sir Winston Churchill. Andrew Jackson, David Burns, and Abigail Adams are among the other paranormal guests.

Remember how everyone was worried about ebooks taking over the print sector a few years ago? That did not take place. Ebook sales have been progressively declining, and this trend appears to be continuing. People, it turns out, adore tactile, actual, flip-the-page books!

Although stingrays don't have teeth, they still resemble sharks in a number of ways. They share similar skin and belong to the same family of cartilaginous fish, which are supported by cartilage rather than bones in their skeletons. Additionally, they employ the same ampullae of Lorenzini sensors, unique sense organs that detect electrical signals released by prey.

Glass is reusable indefinitely without sacrificing its quality or purity. 
 

Brakes that do not lock up under full pedal pressure are becoming commonplace. They've saved numerous lives by letting the driver to keep steering the car and, hopefully, avoid a collision while braking hard. Mercedes-Benz improved the technology with Bosch in the 1970s before incorporating it into the S-Class in 1978. Anti-lock brakes were soon made standard on all Mercedes-Benz models.

Donald Davies, a computer pioneer, helped pave the path for the birth of the internet by inventing packet-switched networking. (In addition, fellow Briton Sir Tim Berners-Lee created the World Wide Web.)

It was used for the execution of captives, including as Christians and Jews, as part of the Roman Triumph, as well as chariot racing. Historians estimate that the Circus Maximum could house 150,000 - 250,000 people at any given time. This implies it might house more spectators than North Korea's Rungrado May Day Stadium, the world's largest capacity stadium, which can hold around 114,000 people.

Highly intelligent, and amicable, they’re one of the most versatile and adaptable dog breeds found in India. Desi dogs are loyal, loving, and street-smart. 
Indian Pariah dogs make for loving family pets and are great with kids and adults. They are high on energy and complement kids with an active lifestyle.

Seafood was the most prevalent source of protein for Vikings, which makes sense for seafarers. They also ate animals such as horses, cattle, sheep, and poultry. The most prevalent seasoning was salt, which was also used to preserve meat for lengthy periods of time. Smoking was another popular method of seasoning and preserving meat, however, spices from other countries were also employed as seasoning. The Vikings cultivated their territories as well, planting rye and wheat for bread and oats for ground meal. They also farmed fruits and vegetables, however archaeologists believe the quality of their farming was poor.

When Thracian tribes initially settled the Bulgarian capital in 7000 BC, it began a very intriguing history. 

Originally known as Serdika, Ulpia Serdica is now the preferred name for Sofia. In honor of St. Sophia Cathedral, it was renamed Sofia in the fourteenth century.

Consistently on the late spring solstice, a special ball game is played at the Growden Remembrance Park known as the 12 PM Sun Game. The game took place in Fairbanks, Alaska, and because the Sun was out for almost 24 hours on the solstice, there was no artificial lighting from 10:30 p.m. to 1:30 a.m. The custom started in 1906 and has been played consistently beginning around 1960 by The Frozen North Goldpanners.

Over 37,000 people gather at Stonehenge in southern England to observe the summer solstice. Druids and agnostics are among the people who commend the longest day of the year at this striking spot.

Data analysis by Vocativ (via Yahoo! News) found that more world leaders are Scorpios than any other sign, with 22 powerful representatives. Scorpios are known for their independence and ambition, which may assist them in climbing the ladder.

A serum is an excellent moisturizer for the skin. While moisturisers stay on the skin's barrier and prevent moisture from leaving, serums penetrate deep into the skin and replace moisture that has been lost.

13 frames per second is the minimum speed required by the human brain to process consecutive images as movement. Anything less, and the human brain will treat each frame as a separate image. Because 16 FPS is so close to 13, old movies appear choppy and unnatural.

What happens after you save the world? Of course, you'll want to eat something. In The Avengers, our heroes go out for shawarma after winning the Battle of New York, but Steve Rogers, a.k.a. Captain America, doesn't appear to be partaking. This is due to the fact that Chris Evans had grown a beard for his next film, Snowpiercer, and was unable to shave it in time for the last-minute scene. The actor wore a prosthetic jaw to keep him looking like our fresh-faced Captain America (who wouldn't grow his own beard until Infinity War). He's not only not eating, but he's also covering half of his face with his hand.

Every time rattlesnakes molt after growing out of their previous skin, their bodies automatically add another segment to their rattles. However, because parts of the rattle frequently break off as they become older, this does not always indicate that you can determine a rattler's age by the length of its tail.

It’s a tactile alphabet that can be used to write almost any language. There are braille versions of Chinese, Spanish, Arabic, Hebrew and many others.

There are eight ways to Mate in two moves from the starting position, but 355 ways to Mate in three moves. It should be noted that the average game lasts 38 moves.

Did you think Captain America was the first Marvel superhero? You'd be correct if it weren't for some cunning adjustments. The Human Torch — not Johnny Storm, but an android who could manipulate fire – was Marvel's first hero, initially appearing in Marvel #1 in 1939. More than 800,000 copies of the comic book were sold. Our favourite Cap wasn't born until 1941, yet he sold over a million copies.