Cities built from scratch using driverless electric cars, prefab housing, and hydroponics can solve problems
that existing cities can't.
Rocketry is experiencing a renaissance with SpaceX's new methane rocket and Stratolaunch's aircraft launch platform.
The platinum in a 1 km metallic asteroid is worth 1 trillion dollars, and we already have the rocket technology needed to get it.
Solar cells provide a return on investment competitive with high-risk stocks.
Electric cars outperform gasoline cars in all aspects except range. The future will see a flood of cheap electric cars.
Flying electric cars are practical with present technology, and they can stay aloft for 30 minutes.
Hydrogen bombs are the only way to defend against asteroids. All other methods are too feeble.
New superalloys exceed the strength to weight ratio of diamond.
A pocket nuclear battery can power your laptop for 20 years.
Bringing an iron asteroid to the Earth provides limitless carbon-free energy.
Thorium is an untapped source of nuclear energy with reserves as large as for uranium.
Great Americans and great American things
The biochar technique produces CO2-free electricity by burning plants in a zero oxygen atmosphere.
Mars can be terraformed within 30 years by crashing a Kuiper belt object into it.
We have the technology to build a fission rocket that can reach Alpha Centauri in 50 years.
Geoengineering can fix any climate problem and we don't have to worry about CO2 emissions
Space mirrors are affordable and they can do whatever we want with the Earth's climate.
The technology needed to build cities on the Moon and Mars was available decades ago.
Physics of Valyrian steel.
Physics of Game of Thrones Wildfire
Icebergs can supply the tropics with cheap fresh water.
The Antarctic ice flow into the ocean can be slowed with the "crushed ice" technique.
Recent advances in battery technology are changing the game of electric vehicles.
America's natural disaster risk.
We can build an electron collider that can produce particles with an energy of 100 TeV, 100 times that of the Large Hadron Collider.
A telescope revolution will occur when we build a base station in space at the Lagrange L2 point.
The chief obstacle to solar system exploraton is radiation and it can only be solved with ice from the moon.
The future of ground telescopes is Antarctica.
Laser fusion will work well before plasma fusion.
Technetium is an unexplored miracle metal.
The radioactive waste produced by nuclear reactors cannot be fully neutralized.
Astronauts going to Mars can expect a luxurious ride in a spaceship larger than most Manhattan apartments.
Washington State is overdue for a volcanic eruption.
San Francisco is overdue for a magnitude 8 earthquake.
The little-known "Oberth maneuver" is the key to solar system exploration, and only chemical rockets can harness it.
There are likely alien civilizations with a billion year head start on us, and they have plenty of time to get here
The space shuttle was senseless. The reentry vehicle need only be a 4 ton ball of iron obtained from the moon.
Fertilizing the oceans with iron is a cheap way to remove CO2 from the atmosphere.
Antarctica is the best place on the planet for wind turbines.
Nuclear transmutation can cheaply produce platinum, ruthenium, and rhodium.
The world's largest telescope is the "Square Kilometer Array" radio telescope.
The ion drive has been perfected by Chang-Diaz and is ready for solar system missions.
Arrow's theorem of elections
The NFL regular season matters for the playoffs and the NBA regular season doesn't.
Once upon a time, Professors Peter Goldreich and Sterl Phinney pioneered an order-of-magnitude physics class at Caltech.
"The art of insight in science and engineering", Sanjoy Mahajan
"Street-fighting mathematics, the art of educated guessing and opportunistic problem solving", Sanjoy Mahajan
"Order-of-magnitude physics: understanding the world with dimensional analysis, educated guesswork, and white lies", Peter Goldreich, Sanjoy Mahajan, and Sterl Phinney
"Order-of-magnitude physics", Jay Maron
"The solar system", Eric Blackman
"Astropedia", Chris Impey
"The astronomical reach of fundamental physics", Adam Burrows and Jeremiah Ostriker
David Hogg, "Real-world physics: a dropped bucket"
David Hogg, "Air resistance"
Sanjoy Mahanan and David Hogg, "Introductory physics, the new scholasticism"
Sterl Phinney, Caltech
Eugene Chiang, Berkeley
Nir Shaviv, Hebrew University of Jerusalem
Helmholtz: "I have no satisfaction in formulas unless I feel their numerical magnitude."
I teach the "Solar System" and "Space, Time, and Motion" classes at AMNH.
Physics of Music
Physics: mechanics, electromagnetism, lab, quantum mechanics, relativity
E strings are like skiing on ice. C strings are like skiing in powder.
An orchestra is only as strong as its last viola.
General LeMay: "Flying fighters is fun. Flying bombers is important".
Bach: Playing violin is fun. Playing viola is important.
Fundamental physics constants:
Speed of light = 2.998e8 meters/second Planck constant = 6.626e-34 Joule seconds Gravity constant = 6.674e-11 meters3 kg-1 seconds-2 Viola string = .39 meters (Longest string for which a human hand can span a fourth) Cello string = .69 meters (Longest string for which a human hand can span a third)How do you keep your violin from being stolen?
Neil deGrasse Tyson (tweet): Kf you seek only easy problems to solve, then ultimately, there'll be nothing about you to distinguish yourself from others.
Richard Askey (mathematician): If things are nice there is probably a good reason why they are nice: and if you do not know at least one reason for this good fortune, then you still have work to do.
Neil deGrasse Tyson
Pedro da Silva. composer/guitarist
Brian Malow, The Science Comedian
Astrophysics at the American Museum of Natural History
Julie Urban     Planthopper
Matthew Bertone     Entomology, systematics, media
Not Even Wrong     Peter Woit
Cosmic Variance     Sean Carroll
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