How old is human?
How old is human? sapiens was thought to have evolved approximately 200,000 years ago in East Africa. This estimate was shaped by the discovery in 1967 of the oldest remains attributed to H. sapiens, at a site in Ethiopia’s Omo Valley.
What was the first life on Earth?
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.
How did the world start?
A big bang to be exact! Billions of years ago, all matter of the universe was compressed into one tiny point until it finally exploded around 12-14 billion years ago. This explosion is what scientists call the Big Bang. During this time, humongous masses of dust and gas spewed throughout space.
How did life start on Earth?
After things cooled down, simple organic molecules began to form under the blanket of hydrogen. Those molecules, some scientists think, eventually linked up to form RNA, a molecular player long credited as essential for life’s dawn. In short, the stage for life’s emergence was set almost as soon as our planet was born.
