Earth is in Solar System.

Earth ...

has a mass of 5,792,000,000,000,000,000,000,000 Kg.

has a diameter at the Equator of 12,756 km.

has circumference at the Equator of 40,075 Km.

is spinning around its axis at 1,700 Km per hour.

spins around the Sun every 365.2564 days travelling distance of 940,000,000 Km at an average speed of 107,208 Km per hour.

Earth Atmosphere

Earth Atmosphere. A layer of gases that surround the Earth. The atmosphere is around 100 Km deep. Three quarters of the atmosphere is contained within the first 11 Km.

The Atmospehere has a number of layers:

Mesosphere: 50 to 80 km

Stratosphere: 12 to 50 km

Troposphere: 0 to 12 km









Homo Erectus

Homo Erectus emerged around 2 millions years ago.

Homo Neanderthalis

Homo Neanderthalis is an extinct species of @@Humans that lived in Europe and Asia until around 40,000 years ago. It is unclear what caused their extinction.

1829. Dutch naturalist Philippe-Charles Schmerling discovered the remains of a Neaderthal skull at Grottes d'Engis, Belgium. He believed the skull to be of a Homo Sapiens.