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Q: What are 2 of the most important discoveries in the last 2 million years?
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What is the most important space discoveries in the last ten years?

the largest solar flare


What are oldest life forms on earth?

In its 4.6 billion yearscircling the sun, the Earth has harbored an increasing diversity of life forms:for the last 3.6 billion years, simple cells(prokaryotes);for the last 3.4 billion years, cyanobacteriaperformingphotosynthesis;for the last 2 billion years, complex cells(eukaryotes);for the last 1.2 billion years, eukaryotes which sexually reproducefor the last 1 billion years, multicellular life;for the last 600 million years, simple animals;for the last 550 million years, bilaterians, water life forms with a front and a back;for the last 500 million years, fish and proto-amphibians;for the last 475 million years, land plants;for the last 400 million years, insects and seeds;for the last 360 million years, amphibians;for the last 300 million years, reptiles;for the last 200 million years, mammals;for the last 150 million years, birds;for the last 130 million years, flowers;for the last 60 million years, the primates,for the last 20 million years, the family Hominidae(great apes);for the last 2.5 million years, the genus Homo (human predecessors);for the last 200,000 years, anatomically modern humans.Periodic extinctions have temporarily reduced diversity, eliminating:2.4 billion years ago, many obligate anaerobes, in the oxygen catastrophe;252 million years ago, the trilobites, in the Permian-Triassic extinction event;66 million years ago, the pterosaurs and nonavian dinosaurs, in the Cretaceous-Paleogene extinction event.all dates are approximate


What are some scientific discoveries in the last ten years?

doctors and researchers have recently found stemcells


How long did the Ordovician period last?

The Ordovician lasted for 47 million years from 490 to 443 Million Years Ago.


How long does an iceage last?

20,000 years . Or several million years.


How long did ordovician last?

The Ordovician lasted for 47 million years from 490 to 443 Million Years Ago.


How long did the stone last?

2.5 million years


How long did the Cambrian last?

55 million years


When did the last mass extinction occur in years?

65 million years ago


How long did Ordovician period last?

The Ordovician lasted for 47 million years from 490 to 443 Million Years Ago.


Humans have become dominant in the last years?

1 million


How long did Cambrian period last?

55 million years