The early atmosphere on Earth was mostly carbon dioxide.
It was also poisonous and extremely hot.
Atmosphere is the gaseous envelope of a planet.
Today's atmospheric functions include sustaining life with oxygen, produced from plants; filtering harmful rays from the sun, helping in protecting the Earth from meteor collisions.
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<span>B. Galileo used his telescope to find evidence that Earth is not the center of the universe. This discovery contradicted the teachings of the Catholic Church, suggesting that religion was not the only guide to truth </span>
