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Stephen Hawking thought an asteroid impact posed the greatest threat to life on Earth. Thanks to Kiwico for sponsoring this video. For 50% off your first month of any crate, go to https://kiwico.com/veritasium50
For other potential world ending catastrophes, check out Domain of Science: https://ve42.co/DoS

Special thanks to:
Prof. Dave Jewitt from UCLA Earth, Planetary, and Space Sciences.
Prof. Mark Boslough from Sandia National Labs.
Scott Manley: https://www.youtube.com/user/szyzyg.
Ryan Wyatt at Morrison Planetarium.
Prof. Amy Mainzer.
Alexandr Ivanov for the opening shot of Chelyabinsk Meteor.

Maps of Asteroid Impacts —https://ve42.co/Map.

Time passing animation from Universe Sandbox — http://universesandbox.com/

Interesting initiative (US Smart Cities) that could be applied to space cities.


Jeffrey Berns, CEO of Nevada-based Blockchains LLC, envisions a city where people not only purchase goods and services with digital currency but also log their entire online footprint — financial statements, medical records and personal data — on blockchain. Blockchain is a digital ledger known mostly for recording cryptocurrency transactions but also has been adopted by some local governments for everything from documenting marriage licenses to facilitating elections.

The company wants to break ground by 2022 in rural Storey County, 12 miles (19 kilometers) east of Reno. It’s proposing to build 15000 homes and 33 million square feet (3 million square meters) of commercial and industrial space within 75 years. Berns, whose idea is the basis for draft legislation that some lawmakers saw behind closed doors last week, said traditional government doesn’t offer enough flexibility to create a community where people can invent new uses for this technology.

“There’s got to be a place somewhere on this planet where people are willing to just start from scratch and say, ‘We’re not going to do things this way just because it’s the way we’ve done it,’” Berns said.

A French military bioethics panel has cleared the development of technological upgrades for members of the armed forces. The panel says the French Armed Forces may develop and deploy technological augments in order to preserve the French military’s “operational superiority.”

➡ You love badass military tech. So do we. Let’s nerd out over it together.