Historical maps showing territorial changes of countries and historical events of the past.
The British Empire was the most extensive empire by area. The area of the empire at its territorial peak was 35.5 million square kilometers (13.7 million square miles). British Empire has invaded about 90% of the countries around the earth.
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Solar System appeared 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast bulk of the Solare system’s mass is in the Sun, with most of the remaining mass contained in Jupiter. This planet and Saturn are gas giants, mainly formed of hydrogen and helium; Uranus and Neptune are ice giants. The four smaller innermost planets, Mercury, Venus, Earth, and Mars, are terrestrial, being principally formed of rock and metal.
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