Interesting Engineering on MSN2d
Could alien oceans be green: Earth’s past may hold the key to finding life elsewhere
Researchers have found that Earth’s first oceans may not have been blue at all like today. Instead, they may have gleamed in ...
National Geographic news5mon
Precambrian Time
About 800 million years ago, oxygen levels reached about 21 percent and began to breathe life into more complex organisms. The oxygen-rich ozone layer was also established, shielding the Earth's ...
600 Million Years Ago, an Asteroid Strike Shook the Planet – And Its Effects May Still Linger
Around 600 million years ago, Earth was home to strange, soft-bodied sea creatures, but a powerful asteroid impact in what is ...
BGR5y
A day on Earth was a half-hour shorter just 70 million years ago
A day on Earth was just 23.5 hours long, 70 million years ago. Researchers discovered this by studying the growth rings of ancient mollusk fossils. The findings could tell us more about or planet ...
Popular Science3d
Earth’s oceans weren’t always blue, scientists say
Although Earth itself cohered into a planet around 4.5 billion years ago, most estimates suggest it took at least another 800 million years before the earliest lifeforms developed. But while ...
Samaa TV1d
Early oceans were green, not blue: study
The earliest lifeforms, cyanobacteria, appeared around 4 billion years ago. These organisms, now known as algae, were among the first to engage in oxygenic photosynthesis.
Ars Technica1mon
Did the snowball Earth give complex life a boost?
Earth didn’t just go through one deep freeze ... located in present-day Scotland and Ireland. Formed about 800 million years ago on the eastern shore of a past continent called Laurentia ...