You are able to queue for the live event two hours early starting at 12:00 PM ET. The “Death Star Sabotage” tile will be on the top row of Discover during this time.

Eons are the broadest category. From oldest to youngest, they are the Hadeon, Archean, Proterozoic, and Phanerozoic eons. Each eon is subdivided into eras. The Phanerozoic Eon is divided into the ...

The Proterozoic Eon, spanning from 2,500 million to 539 million years ago, marked a transformative chapter in Earth's history ...

Understanding proterozoic life — the basics During the Proterozoic eon, which lasted from about 2.5 billion to 541 million years ago, life on Earth was mostly simple and microscopic. Imagine tiny ...

This is exemplified by the well-known mass extinction events and associated environmental perturbations during the Phanerozoic Eon (538 Ma – present day). The Proterozoic Eon also saw significant ...

This is exemplified by the well-known mass extinction events and associated environmental perturbations during the Phanerozoic Eon (538 Ma – present day).

A compilation of many different kinds of natural scientific investigations and their interrelations as well as their collective interpretation are necessary to understand past, presence and future of ...

Proterozoic Eon (2.5 billion - 541 million years ago): Development of more complex life forms (eukaryotes); appearance of multicellular organisms. Paleozoic Era (541 - 252 million years ago) ...

Scientist Elizabeth Turner found fossilized evidence of 890-million-year-old sponges. These are possibly the earliest known evidence of animal life on Earth.