Explanation

In the republic government, the citizens have the supreme power, and they exercise that power by voting.

There are 90 countries in the world today which have republic governments.

Explanation

Explanation

Penicillin was discovered by Alexander Flaming In 1928

Penicillin was the first true antibiotic

The first patient Albert Alexander, a 43-year-old policeman, was treated with penicillin on 12 February 1941

Alexander Flaming determined that penicillin had an antibacterial effect and published his findings in 1929 

Explanation

The Uncertainty Principle was given by Werner Heisenberg.

Heisenberg was a German physicist.

Heisenberg gave The Uncertainty Principle in 1927.

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Explanation

The Large High Altitude Air Shower Observatory, the biggest device of its kind, has detected a dozen sources of ultra-high-energy gamma rays.

According to a study in the journal Nature, Gamma rays with such high energy have never been detected before in our Milky Way galaxy.

More than 530 photons at energies above 100 teraelectronvolts and up to 1.4 PeV were detected.

Explanation

Strait of Gibraltar is located in the Iberian Peninsula (Spain).

The Strait of Gibraltar separates Europe from Africa

The Strait Gibraltar connects two large water bodies, the Atlantic Ocean & Mediterranean Sea.

Explanation

Laos is the only landlocked country in Southeast Asia.

Laos is bordered by Cambodia, China, Myanmar, Thailand and Vietnam.

Laos Capital is Vientiane.

Laos Currency is Kip.

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Explanation

Explanation

The Mississippi River is referred to as the Father of Waters 

Another nickname for the Mississippi River is the Old Man River.

Explanation

The Port of Shanghai is China's most populous city, the world's second-busiest seaport,

Shanghai is China's one of the world's largest cities by area. 

Located on the mouth of the Yangtze River in east-central China off the East China Sea,