It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms. These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe.

roughly 13.7 billion years ago

The end result is unknown; a simple estimation would have all the matter and space-time in the universe collapse into a dimensionless singularity back into how the universe started with the Big Bang, but at these scales unknown quantum effects need to be considered (see Quantum gravity).

Our universe is but one in an unimaginably massive ocean of universes called the multiverse. If that concept isn’t enough to get your head around, physics describes different kinds of multiverse. The easiest one to comprehend is called the cosmological multiverse.

God did not create the universe, the man who is arguably Britain’s most famous living scientist says in a forthcoming book. In the new work, The Grand Design, Professor Stephen Hawking argues that the Big Bang, rather than occurring following the intervention of a divine being, was inevitable due to the law of gravity.

Africa

4.543 billion years

4.54 billion years

4.603 billion years

The oldest rocks on earth: The oldest rock so far found on earth has an age of 4.0 billion years….

Zircons

Acasta Gneiss

The oldest places on earth

• Burrup Peninsula, Australia. The Damper Archipelago in Murujuga National Park is home to what is thought to be the oldest collection of rock carvings in the world.
• Great Pyramids of Giza, Egypt.
• Athens, Greece.
• Varanasi, India.
• Lisbon, Portugal.

St. Augustine

Here are 10 of the oldest, continuously inhabited cities in the world today.

• Aleppo, Syria.
• Beirut, Lebanon.
• Jericho, West Bank.
• Byblos, Lebanon.
• Athens, Greece.
• Plovdiv, Bulgaria.
• Sidon, Lebanon.
• Faiyum, Egypt.

1. London. As the “capital of capitals” negotiates the uncharted terrain of a post-Brexit world, for now it still reigns atop the planet’s best cities for the fifth year running.
2. New York. America’s urban heart was broken by the pandemic and has a long way back.
3. Paris.
4. Moscow.
5. Tokyo.
6. Dubai.
7. Singapore.
8. Barcelona.

The world’s cleanest cities

• #1: CALGARY. Calgary in Canada is the world’s cleanest city, and with a population of more than a million, that’s quite something.
• #2: ZURICH. Zurich in Switzerland attracts thousands of tourists every year, especially those who enjoy the winter snow.
• #3: LUXEMBOURG.
• #4: ADELAIDE.
• #5: SINGAPORE.

Top 10 most beautiful cities in the world

• AMSTERDAM, THE NETHERLANDS.
• PRAGUE, CZECH REPUBLIC.
• HONG KONG, CHINA.
• PARIS, FRANCE.
• RIO DE JANEIRO, BRAZIL.
• SAN FRANCISCO, USA.
• ROME, ITALY.
• NEW YORK CITY, USA.

• London, England. Highlighted rankings: Promotion (1), Programming (2)
• New York City, United States. Highlighted rankings: Programming (1), Promotion (2)
• Paris, France. Highlighted rankings: Product (3), Promotion (3)
• Moscow, Russia.
• Tokyo, Japan.
• Dubai, United Arab Emirates.
• Singapore.
• Barcelona, Spain.

World City Populations 2021

• Tokyo (Population: 37,435,191)
• Delhi (Population: 29,399,141)
• Shanghai (Population: 26,317,104)
• Sao Paulo (Population: 21,846,507)
• Mexico City (Population: 21,671,908)
• Cairo (Population: 20,484,965)
• Dhaka (Population: 20,283,552)
• Mumbai (Population: 20,185,064)

Following those criteria, these would be the 10 most beautiful cities in the world for us.

• – Kyoto, Japan.
• -Dubrovnik, Croatia.
• -St. Petersburg, Russia.
• -Prague, Czech Republic.
• -Cape Town, South Africa.
• -Bergen, Norway.
• -Istanbul, Turkey.
• -San Francisco, United States.

The winner for the best place to live in 2020 is Portugal.

Switzerland