The Big Bang Theory
The prevailing scientific theory is that the universe started with the Big Bang.
by the big bang
first era was the Precambrian
con las manos
prokataryotic and autotrophic
the answer is "first".
PRECAMBRIAN :)a+
They believe the planets formed from a disc of gas and dust called a "protoplanetary disc".
Scientists believe that lightning is formed when air and ice particles rub against one another in a cloud.
It is believed that the universe first formed approximately 13.7 billion years ago.
dust and ice and other partcials
Nebula