The world is today at equilibrium. Battery operated devices use DC current and the misc household and industrial appliances use AC current

But almost 140 years ago, that was not the case. A fierce battle was fought between two scientists Tesla and Edison over it. #CBG_Thread 1/n

Buckle up, everyone, this story is *wild*.

The 62-year-old Dyatlov Pass mystery, in which nine students died at the hands of an unknown force, has likely been solved thanks to the movie Frozen and gruesome car crash experiments.

Me, for @NatGeo + thread!

In what has become known as the Dyatlov Pass incident, ten members of the Urals Polytechnic Institute in Yekaterinburg—nine students and one sports instructor who fought in World War II—headed into the frigid wilderness on a skiing expedition on January 23, 1959. 1/x

One student turned back after experiencing joint pain.

He never saw his friends again.

2/x

The team made camp on February 1, pitching a large tent on the snowy slopes of Kholat Saykhl, whose name can be interpreted as “Dead Mountain” in the language of the region’s Indigenous Mansi people. Ominous, sure - but these were experienced mountain hikers. 3/x

The nine were never heard from again.

When a search team arrived at Kholat Saykhl a few weeks later, the tent was found just barely sticking out of the snow, and it appeared cut open from the inside. The next day, the first of the bodies was found near a cedar tree. 4/x

Following the demolition of Babri Masjid by 150,000 kar sevaks of RSS, BJP and VHP in 1992, there were a number of mosques which were closed down across India after the Sang Parivar threatened to demolish them as well. The names of those mosques are enlisted in this thread:

Punjab
1. Masjid Dakan Sahay Jalandhar
2. Masjid Noor Saray Noor Mehal

Rajasthan
1. Ahya-Din ka Jhonpra, Ajmer Sharif
2. Jamia Masjid, Tambir

Tamil Nadu
1. Masjid Krishnagri
2. Masjid Arkat
3. Purani Masjid of Kila Dhelore
4. Internal Masjid of Kila Dhelore

[1]

5. Masjid Saadatullah Khan Gajni
6. Two mosques of Injin Gri Kila
7. Masjid Shams ud Din Vilaporam
8. Jamia Masjid Vilaporam

Uttar Pradesh
1. Purani Nawabi Masjid, Faizabad
2. Masjid of Haji Iqbal’s Courtyard, Faizabad
3. Jamia Masjid, Banda

4. Inner Mosque of Kila, Jonpur
5. Atla’s Masjid, Jonpur
6. Jamia Masjid, Jonpur
7. Lal Masjid, Lal Darwaza
8. Jhunjari Masjid, Lal Darwaza
9. Char Ungli Masjid, Lal Darwaza
10. Masjid Sheikh Burhan Zafar Abad, District Jonpur
11. Dhara Masjid, Waransi

12. Masjid Asauli, Waransi
13. Nagina Masjid Agra, Qila Agra
14. Akbri Masjid, Agra
15. New Masjid, Agra
16. Moti Masjid, Agra
17. Inner Mosque of Feroz Shah Tomb
18. Masjid of Tomb Jafar Khan
19. Masjid near ROza Diwali Begum
20. Masjid Fateh Pur, Taj Mehal Agra

In 1637, the Dutch Republic erupted into a speculative fever over an unlikely item...the tulip.

Tulip Mania has become a legend synonymous with market euphoria and bubbles. But is this tale all it's cracked up to be?

Who's up for a story?

👇👇👇

1/ The tulip is a spring-blooming flower native to the valleys of the Tien Shan Mountains in Central Asia.

It is believed to have been introduced to Europe in 1554, when an ambassador of the Holy Roman Emperor sent tulip bulbs and seeds to Vienna from the Ottoman Empire.

2/ Tulips gained in popularity as people were attracted to their rich color and ability to grow in sub-optimal conditions.

They soon became a coveted status symbol for the wealthy.

The Semper Augustus, with its colorful, flame-like streaks, was the most desired of them all.

3/ By the early 1600s, the Dutch Republic was entering a golden age.

Many financial innovations popped up during this time - the first stock exchange, for example.

But it was another financial innovation that would propel tulips into historical lore: the futures contract.

4/ As tulips grow slowly and may take several years to bloom, paper contracts were written that entitled the buyer to the future tulips.

These contracts were freely-traded.

So in addition to the physical market for tulip bulbs, a thriving paper market was established.

Do u know about the Diamond known as The Eye of Brahma?

The Eye of Brahma also known as Black Orlov is 7th largest black diamond in the world of Indian origin. It weighs 67.50carats(13.500 g).The diamond was originally 195carats(39.0g)&was discovered in early 19th century India.

The Black Orlov featured as one of the eyes in a statue of the Hindu god Brahma in Puducherry. One night a European Jesuit priest who asked for refuge inside the temple, took advantage of the generosity, plucked and looted the diamond out of the idol's eyes.

It is said after this incident the diamond became cursed.

In 1932, diamond dealer J. W. Paris reportedly took the diamond to the United States, and soon after committed suicide by jumping from a skyscraper in New York City.

Later owners of the diamond included two Russian princesses, Leonila Galitsine-Bariatinsky and Nadia Vygin-Orlov (after whom the diamond is named). Both women allegedly jumped to their deaths in the 1940s.

The diamond was later bought by Charles F. Winson, and cut into three pieces in an attempt to break the curse; the 67.5-carat Black Orlov was set into a brooch of 108 diamonds, suspended from a necklace of 124 diamonds.

#BlackHistoryMonth In the Navy, I was fortunate to serve at Commander Cruiser Destroyer Group 2(CCDG2). I reported to duty in 1981 as Radioman Seaman Apprentice(RMSA), and served through 1985 in the communications division achieving the rank of Petty Officer 2nd Class(RM2/SW) /1

This was my first duty assignment. But my first is not important as the first African-American who served as CCDG2's Commanding Officer prior to my arrival, Rear Admiral Samuel L. Gravely, Jr. He was a trailblazer. He was commissioned an Ensign on November 14, 1944. /2

He enlisted and then became one of the first commissioned African-American officers in the US Navy. He was denied housing and even jailed for impersonating an officer. He withstood a cavalcade of abuse and racism and still managed to rise through the ranks of the Navy. /3

He became the first to serve under combat conditions during WW2. He served during the Korean & Vietnam War. He was the first to command a fighting vessel, and commander of the 3rd fleet. He served as Communications officer on the USS IOWA BB-61 /4

He served as the first African-American to command (USS Theodore E. Chandler (DD 717)); command a major warship (USS Jouett (DLG 29)) - and was the first African-American to achieve the rank of Captain in 1967. /5