con las manos
first era was the Precambrian
the answer is "first".
prokataryotic and autotrophic
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.
Most scientists believe the Moon formed as a satellite.
Nebula
dust and ice and other partcials
Birds, which are not just considered descendants of dinosaurs; they are dinosaurs.
Scientists believe that the solar system formed about 4.5 billion years ago.
The Big Bang Theory