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A two-year expedition to coral reefs in the Pacific Ocean detected half a million types of microbes, the latest estimate in the quest to quantify the planet’s microbiome.

The big picture: There is intense debate among scientists about how many different types of bacteria and other microorganisms live on Earth — information that could aid conservation of species and fragile ecosystems brimming with biodiversity.

In this video we explore the potencial risks that threat the stability and the survival of our civilization. Reviewing past civilizations collapses like the Bronze Age Collapse and the fall of the Roman Empire and see if any of the signed that led to past collapse exists today.

- Bronze age collapse.
- Roman Empire collapse.
- Alarming signes today.

Links:
Quora blog: https://spacefaringcivilization.quora.com/
Amazon Author page: http://amazon.com/author/ronfriedman.
My Website: https://ronsfriedman.wordpress.com/

How to support the channel:

Musk criticized Twitter’s safety and content moderation team’s handling of tweets about a documentary called “What is a Woman?” (Ludovic Marin/Pool?AFP via Getty Images / Getty Images)

In confirming her resignation, Ella Irwin wrote, “So one or two people noticed that I left Twitter yesterday. I know there’s been a lot of speculation regarding what happened. Was I fired? Did I quit?”

She added, “I did resign but this has been a once in a lifetime experience and I’m so thankful to have worked with this amazing team of passionate, creative and hardworking people. Will be cheering you all and Twitter as you go!”

The theory of evolution, worked out in the nineteenth century by Charles Darwin and Alfred Russel Wallace, with many tweaks since, is one of the most well-supported theories in science.

Evidence from a wide range of disciplines backs up the basics of the theory. Or, as paleontologist and historian of science Stephen Jay Gould put it in an essay in the May 1981 print issue of this magazine, the theory of evolution is “one of the best documented, most compelling and exciting concepts in all of science.”

For the rest of us, one interesting and sometimes confusing aspect of evolution is the difference between convergent and divergent evolution. Here’s a quick explanation.