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the world
Globally, the 20th century was marked by: (a) two devastating world wars; (b) the Great Depression of the 1930s; (c) the end of vast colonial empires.

en.wikipedia.org/wiki/Earth

Earth otherwise known as the World or the Globe, is the third planet from the Sun and the only object in the Universe known to harbor life. It is the densest planet ...

www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-earth-58.html

Earth is our home planet. Scientists believe Earth and its moon formed around the same time as the rest of the solar system. They think that was about 4.5 billion  ...

www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-earth-k4.html

Planet Earth is called the "Goldilocks planet." Find out why it is just right for us!

www.space.com/54-earth-history-composition-and-atmosphere.html

Dec 11, 2014 ... Earth is the only planet known to support life. Learn about Earth science facts and the planet's interior composition, surface and atmosphere.

nineplanets.org/earth.html

Earth is the third planet from the Sun and the fifth largest: Planet Profile. orbit: 149,600,000 km (1.00 AU) from Sun diameter: 12,756.3 km mass: 5.972e24 kg ...

.ask.com/youtube?q=What+Is+The+Earth%3F&v=HGPv6vo5-l0
Oct 3, 2012 ... Science expert Emerald Robinson explains everything about planet Earth and its location in the solar system. To view over 15000 other how-to, ...
.ask.com/youtube?q=What+Is+The+Earth%3F&v=nt6ab7BTlgE
Aug 28, 2014 ... Nat Geo list of reasons Earth might be useful to other life forms: ... Google Earth global timelapse: https://earthengine.google.org/timela.

space-facts.com/earth

Earth is the third planet from the Sun and is the largest of the terrestrial planets. The Earth is the only planet in our solar system not to be named after a Greek or ...

www.nationalgeographic.com/science/space/solar-system/earth

Learn more about planet Earth and its role in the solar system.