6.5 Billion years ago.
The earth is roughly 4.5 billion years old, give or take a few 'earthdays'.
Scientist theorize that a planet-sized object collided with earth and the moon formed
The Biological origin of Life.
Because life requires chemical processes. They had to be present first...
Which of the following describes how Eratosthenes discovered the approximate circumference of the earth
because titan's atmosphere is much like earth's, scientists hope that studying titan and its atmosphere, it can tell them more about how life began on earth.
Radioactivity
Why do scientists study Earth's tidal patterns?
Scientists who study Earth's surface and interior are called Geologists.
Scientists who study earth's oceans are called oceanographers.
the god! SCIENTISTS GOD dont exsists you stupid div
Cosmology