DOWNHILL Vs DOGS

https://youtu.be/K8pWubpoytY

Ok, I'm way more impressed with the dogs than the bike riders. Incredible speed and agility, and they have to avoid the bike. 

Do I still need to wear N95 after getting the vaccine?

 

Yes, and here's why.

Tesla efficiency in winter

Troubleshoot missing audio files skydio 2

https://youtu.be/V-4pgY-EaVo

0:28 Explains how to get audio files attached to your skydio video - have to sync the files right after flying, before powering down either the drone or your phone. 

MIPS Protection – helmet safety – brain protection system

This addition to regular helmets allows about 15 degrees of helmet rotation during impact while the straps remain fixed, producing less rotational station on the brain. It's illustrated well on this page. 

https://mipsprotection.com/

Start watching at 0:59

SHERP all terrain vehicle

https://youtu.be/WrjjV6nGh0g

Lots of incredible off-road capabilities, but the most remarkable to me is climbing out of water into ice, at 2:29. That takes good flotation, very grippy tires, and ability to climb a steep angle. 

Behind the Scenes- Drone Light Show

https://youtu.be/rnwwXGYF3r0

This video elucidates all the steps and safety prep that go into a drone light show. 

Extremely precise GPS positioning when setting up the launch. 

RF detector sweeps the flight area for interfering radio signals. 

These enterprising engineers designed the software and built the drones themselves.

Owls fly silently

 

Beautiful footage of acoustic hunting underneath deep snow.

At 8:28, a comparison illustrating how little noise an owl makes compared to other birds.

And again at 10:42 where each bird flies directly over some loose feathers. However, the owl was gliding while the other birds were accelerating. 

Most Surprising MythBusters Result

https://youtu.be/8wG-gr_IRHQ

Dimples like those on a golf ball, on the surface of a car, make it more efficient. 

Of course, the dimples' size and depth would have to be calculated based on the Reynold's number of the air for the speed the car is going, so their result could be improved upon. 

Here's the actual episode, including Adam's favorite "reveal" moment. 

https://youtu.be/VUiGhyHC-1A

And here's a car designed with dimples for aerodynamic efficiency. 

97% less CO2 emissions in steel production

Start watching at 6:27. This steel production process releases 97% less CO2 emissions than current methods, by using hydrogen gas rather than coke (from coal) to reduce the iron ore (essentially, de-rusting it) during the first phase of steel production.  

And, as he mentions at 8:26, generating that hydrogen from electricity can be done at non-peak-demand hours at night, for grid-balancing (i.e. keeping electric power generation at optimum outputs around the clock rather than revving them up and winding them down as demand fluctuates.) The stored hydrogen can then be used as needed when steel production is active. 

At 9:05, he mentions that the initial €150M trial project will be scaled up 200-fold larger if successful. 

https://youtu.be/ywHJt88H5YQ

Fox Dives Headfirst Into Snow

https://youtu.be/D2SoGHFM18I

Researchers think these foxes detect variations in the magnetic field, and faint sounds emanating from under the snow, to catch prey underneath 3 feet of snow cover. 

"foxes prefer to jump in a particular direction... about 20 degrees off "magnetic north"... when they pointed in that particular northeasterly direction...they killed on 73 percent of their attacks... If they reversed direction, and jumped exactly the opposite way, they killed 60 percent of the time. But in all other directions...only 18 percent of those jumps were successful."

More detail at

 https://www.npr.org/sections/krulwich/2014/01/03/259136596/youre-invisible-but-ill-eat-you-anyway-secrets-of-snow-diving-foxes

Drug Expiration Dates - Are Expired Drugs Still Safe to Take? Pros and cons

A government investigation to save money by adding expired drug lots: 

"Based on stability data, expiration dates on 88% of the [expired drug] lots were extended beyond their original expiration date for an average of 66 months."

https://www.drugs.com/article/drug-expiration-dates.html

However, the FDA warns of ignoring exportation dates:

"Expired medical products can be less effective or risky due to a change in chemical composition or a decrease in strength. Certain expired medications are at risk of bacterial growth and sub-potent antibiotics can fail to treat infections, leading to more serious illnesses and antibiotic resistance."

https://www.fda.gov/drugs/special-features/dont-be-tempted-use-expired-medicines

Massimo on adjusting the traditional recipe

In the inaugural Chef's Table episode, Massimo is revered as a groundbreaking chef who changed traditional recipes, and was initially much despised for it, until he developed a cult following. 

Here, in his masterclass, he distills his iconoclastic philosophy to this simple quotation. 

"If tradition doesn't respect the ingredients, you have to change the recipe."

-Massimo Buttura, at 12:08 in the Masterclass on "An Evolution of Pesto." 

Creating a Post-Apocalyptic Road Scene in UE4

https://youtu.be/kJuiSERx_AI

Incredibly detailed scene but with drag and drop editing. Mesmerizing to watch it being assembled. 

Gravity Energy Storage : Uplifting technology

https://youtu.be/lh1--ftWWvY

Stacking 35-ton lego blocks to store and release energy - less environmental concerns than pumping water uphill. (They're made from demolition debris, not fresh concrete.)

You can start at 2:19 to skip the long-winded stuff. 

Gravitricity, at 5:43, uses weights hoisted in abandoned mine shafts to release energy on demand.