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A collection of the first 20 Shorts from SFIA, covering a wide range of topics in science & space.

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Credits: Science & Futurism Shorts Compilation #1: 1–20
Episode 414a, October 1, 2023
Written, Produced & Narrated by: Isaac Arthur.

Music Courtesy of:
Epidemic Sound http://epidemicsound.com/creator.

00:00 Intro.
00:30 Quasar Cannon.
1:30 Birch Planets: Galaxy-Sized Worlds.
2:30 Aliens Beyond the Galactic Rim.
3:30 BWC Megastructures & Artificial Planets.
4:29 Hegemonizing Swarms.
5:29 Solar Moths & Solar Sails.
6:27 Fusion Candles.
7:12 Non-Equatorial Space Elevators.
8:10 Building Artificial Planets.
9:10 Computronium.
10:13 Deciphering Alien Codes.
11:12 Astrochickens & Von Neumann Probes.
12:12 Could Dinosaurs have Been killed by Aliens?
13:11 Will Humans In Space Be Taller?
14:02 The Stanford Torus.
15:02 Could Technology Bring You Back to Life?
16:02 Is our galaxy going to Collide with Andromeda?
16:58 The Bernal Sphere.
17:55 Nuclear Lightbulb Spaceship Drive.
18:55 Von Braun Space Station.
19:54 Close

Japanese scientists are reportedly set to start human trials for a drug that can regrow teeth. All being well, the clinical trial will start next year and a tooth regeneration therapy could be ready for people with holey smiles as early as 2030, according to Japanese media.

Back in 2021, a team from the Graduate School of Medicine at Kyoto University published promising research that showed a protein called USAG-1 limits the growth of teeth in mice. By turning off the gene that codes for the production of the protein, the mice were able to freely regrow their teeth.

They were then able to create a neutralizing antibody drug therapy that was able to block the protein’s function, stimulating the mice into growing new sets of teeth. Later experiments showed the same benefits in ferrets, which have a more similar dental pattern to humans.

These stylistic choices make the Aṣṭādhyāyī shorter and easier to memorize than it would be otherwise — some historians believe it was initially composed orally — but also incredibly dense. That density leads to rule conflicts, in which two rules may apply simultaneously to the same word yet produce different outcomes.

Pāṇini did provide a meta-rule to solve such conflicts. According to traditional scholarship, this meta-rule states that “in the event of a conflict between two rules of equal strength, the rule that comes later in the serial order of the Aṣṭādhyāyī wins.”

Seems simple enough. But when applied, this meta-rule yields many exceptions. To correct those exceptions, scholars have for centuries created their own meta-rules. However, those meta-rules yielded even more exceptions, which required the creation of additional meta-rules (meta-meta-rules?). Those meta-rules in turn created even more exceptions — and you see where this is going.

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00:00 — Introduction.
00:38 — Landauer Limit.
02:51 — Quantum Computing.
04:21 — Human Brain Power?
07:03 — Turing Complete Universal Computation?
10:07 — Diminishing Returns.
12:08 — Byzantine Generals Problem.
14:38 — Terminal Race Condition.
17:28 — Metastasis.
20:20 — Polymorphism.
21:45 — Optimal Intelligence.
23:45 — Darwinian Selection “Survival of the Fastest“
26:55 — Speed Chess Metaphor.
29:42 — Conclusion & Recap.

Artificial intelligence and computing power are advancing at an incredible pace. How smart and fast can machines get? This video explores the theoretical limits and cutting-edge capabilities in AI, quantum computing, and more.

We start by looking at the Landauer Limit — the minimum energy required to perform computation. At room temperature, erasing just one bit of information takes 2.85 × 10^−21 joules. This sets limits on efficiency.

Quantum computing offers radical improvements in processing power by utilizing superposition and entanglement. Through quantum parallelism, certain problems can be solved exponentially faster than with classical computing. However, the technology is still in early development.

The human brain is estimated to have the equivalent of 1 exaflop processing power — a billion, billion calculations per second! Yet it uses just 20 watts, making it vastly more energy-efficient than today’s supercomputers. Some theorize the brain may use quantum effects, but this is speculative.