Skip to content

What did the Earth look like 20 – 750 million years ago | Interactive spherical map

September 1, 2020

Watch the continents move around as the millennia roll by.

Just enter your city and pick your period from 0 – 750 million years ago. The continents move but your city stays marked. Use the ← and → keys to step through time. Link to site.

Sample description: 400 million years ago:
Devonian Period. Life on land becomes more complex as plants develop. Insects diversify and fish develop sturdy fins, which eventually evolve into limbs. The first vertebrates walk on land. Oceans and coral reefs host a diverse range of fish, sharks, sea scorpions, and cephalopods.

You can do two (maybe more) cities simultaneous. Los Angeles and Oslo, Norway were pretty close to one another at one time.

Paleogeographic maps by C.R. Scotese, visualization developed by Ian Webster.
[Chuck Almdale]

Los Angeles, CA is the red dot near center.
Didn’t know it was that old, did you?




They even clone themselves into a surprising variety of colors to stay hidden in plain sight from predators.

There’s that old cheesy joke: What’s brown and sticky? A stick.

But sometimes it’s not just a stick — but a walking stick. This non-native insect, originally from India, relies on clever camouflage to hide from predators. They’re so skilled at remaining undercover, you may not have noticed that they’ve made themselves right at home in your local park. Some Bay Area researchers are studying the insects’ genetics to learn more about how they are such masters of camouflage.

“I can’t think of any other insect as effective as they are in remaining hidden in plain sight,” said Edward Ramirez, an undergraduate researcher at the University of California, Berkeley who is currently studying the genetics of Indian walking sticks.

“How is this possible? was always the question that came to mind, so I wanted to search for a more clear answer.”

This is another installment of the PBS Deep Look series. If no film or link appears in this email, go to the blog to view it by clicking on the blog title above. If the film stops & starts in an annoying manner, press pause (lower left double bars ||) to let it buffer and get ahead of you.   [Chuck Almdale]

Comments are closed.

%d bloggers like this: