From History: 66.04 million years ago to the present.
Subject: Evolution.
66 Million years: From extinction to society.
The Cenozoic era starts with the K–Pg extinction 66 million years ago. That event marks the sudden end of the reign of dinosaurs and the rise of mammals and birds.
The Cenozoic Era begins with catastrophe, but its story is really one of opportunity. When the K–Pg extinction struck 66 million years ago, it ended the age of non-avian dinosaurs and shattered ecosystems across the planet. Yet from that loss, mammals diversified into forms large and small, birds spread into skies and habitats once shared with pterosaurs, and flowering plants and grasslands reshaped the land.
was first published on TST 1 week ago.
2. Now for our second story.
From History: 2 Billion Years Ago (+/- 100 million years)
Subject: Evolution.
Nucleus and internal organelles
About 2 billion years ago, eukaryotic cells are defined by a membrane-bound nucleus and internal organelles. Their emergence created the structural foundation for complex life.
By 2 billion years ago, eukaryotic cells emerge with a membrane-bound nucleus and internal organelles (including bacteria organelles). Their emergence created the structural foundation for complex life. By compartmentalizing its own machinery, the eukaryotic cell gained efficiency, coordination, and flexibility.
was first published on TST 2 years ago.