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Dec 6, 2021

The world’s biggest laser: Function, fusion power and solving a supernova

Posted by in categories: cosmology, nuclear energy, satellites

If someone told you that the world’s biggest laser was in California that has something to do with space and national defence, you might imagine it was a super-weapon designed to blast enemy satellites out of the sky. But the reality is quite different. The new laser is a unique research tool for scientists, capable of creating the extreme conditions that exist inside stars and nuclear explosions.

The giant laser is located at the Lawrence Livermore National Laboratory (LLNL) in Livermore, California, and it goes by the rather cryptic name of the National Ignition Facility (NIF). That’s because, in the context of nuclear science, “ignition” has a very specific meaning according to the Lawrence Livermore National Laboratory. It refers to the point at which a fusion reaction becomes self-sustaining – a condition that is found inside the sun and other stars, but is extremely difficult to achieve in an earthbound laboratory. Triggering nuclear fusion requires enormously high temperatures and pressures, and that’s where NIF’s giant laser comes in.

Dec 6, 2021

Elon Musk’s Mars Roadster comments reveal a big SpaceX problem

Posted by in categories: Elon Musk, space travel, sustainability

SpaceX CEO Elon Musk launched his red Tesla Roadster electric car on a tour of the Solar System. But did it really orbit Mars?

Dec 6, 2021

Sean Carroll: Is Consciousness Emergent?

Posted by in categories: cosmology, neuroscience, physics

Theoretical physicist Sean Carroll joins us to discuss whether it make sense to think of consciousness as an emergent phenomenon, and whether contemporary physics points in this direction.

We discussed Sean’s essay responding to Philip’s book ‘Galileo’s Error,’ and Philip’s counter-response essay. Both are available here: https://conscienceandconsciousness.com/2021/08/01/19-essays-on-galileos-error/

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Dec 6, 2021

Elon Musk reportedly demanded cameras over radar in self-driving cars because human eyes don’t rely on radar

Posted by in categories: biological, Elon Musk, robotics/AI

I think his purpose in doing this is to prioritize full self driving over partial self driving features.


“Humans drive with eyes and biological neural nets,” Musk said in October. “So [it] makes sense that cameras and silicon neural nets are [the] only way to achieve generalized solution to self-driving.”

Moreover, he’s reportedly implementing that philosophy at Tesla.

Continue reading “Elon Musk reportedly demanded cameras over radar in self-driving cars because human eyes don’t rely on radar” »

Dec 6, 2021

Does Biology Work Beyond Earth?

Posted by in categories: bioengineering, biological, chemistry, physics, space

A scientist who loves to write, can do it well, and can share the excitement of the scientific pursuit is incredibly rare. Kevin Peter Hand 0, Deputy Project Scientist, Europa and Director of the JPL Ocean Worlds Lab is that rare person who can do all these things. In his incredible book Alien Oceans: The Search for Life in the Depths of Space 0, he explains that “We know that the laws of physics, the principles of chemistry, and the principles of geology all work beyond Earth. We’ve explored other worlds and observed that these sciences are universal. When it comes to biology, however, we have yet to make that leap.”

If you want to learn about how the intersection of numerous areas of science are helping inform our understanding of the oceans, space, and ourselves, Alien Oceans is by far one of the most clearly written books on the topic. As Kevin notes, he wrote the book he wishes he could have read in college. Kevin will teach you and inspire you and explain complicated scientific topics in ways nearly anyone can understand. Not only is it a book about his areas of expertise, it is also a wonderful window into the way scientists and engineers think about solving real world problems and applying basic knowledge. For example, Kevin notes in this interview that “Making measurements is where the creativity of science meets the hard reality of engineering.” I read a lot of books on science written for a broad audience, and this book, by far is among the very best I have ever read. More than anything else what came through in Kevin’s writing is excitement about finding out what is true.

What inspired you to write this book?

Dec 6, 2021

2021 AI Predictions: What We Got Right And Wrong

Posted by in categories: robotics/AI, transportation

No multi-billion-dollar acquisitions occurred in the world of AI chips in 2021.

Instead, the leading AI chip startups all raised rounds at multi-billion-dollar valuations, making clear that they aspire not to get acquired but to become large standalone public companies.

In our predictions last December, we identified three startups in particular as likely acquisition targets. Of these: SambaNova raised a $670 million Series D at a $5 billion valuation in April; Cerebras raised a $250 million Series F at a $4 billion valuation last month; and Graphcore raised $220 million at a valuation close to $3 billion amid rumors of an upcoming IPO.

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Dec 6, 2021

Against The Wind: Sun’s Particles Do Weird Things At Martian Moon

Posted by in category: particle physics

A Martian asteroid-like moon appears to be making waves in the stream of particles the sun sends across the universe. From space, a European Space Agency spacecraft did an experiment to confirm a weird effect first observed at the moon, which is called Phobos, in 2008. The Mars Express spacecraft noticed Phobos “backscattering” or reflecting solar particles during one flyby, but has been unable to spot this again despite zooming by the moon several more times over the years.

Scientists thought they saw more backscattering during a 2016 flyby, but the position of Mars Express at that time led to another hypothesis: maybe the spacecraft itself had caused the effect. So this led to another weird trick: why not do some “fake” flybys of the moon to see if the spacecraft can induce backscattering on another world?

That led to a fun sequence in 2017, the European Space Agency stated, when Mars Express replicated the exact same solar array adjustments and control maneuvers in space with no nearby target except for the solar wind.

Dec 6, 2021

SpaceX Tapped For 3 More Possible Commercial Crew Flights To Space

Posted by in categories: computing, space travel

SpaceX’s Crew Dragon is just going to get busier shuttling astronauts in the coming years.

NASA announced it intends to issue a sole-source modification to SpaceX’s long-term contract to send astronauts to the International Space Station. This follows an agency call for proposals back in October for more flight options to send people to space.

Boeing’s Starliner spacecraft, which is the other major system, is not quite yet ready for humans following a difficult uncrewed test flight in 2019 that never saw the spacecraft reach the ISS. Starliner has spent some time fixing computer glitches and other issues (including a valve problem that delayed an expected 2021 launch) and is now expecting a second uncrewed test flight by 2022.

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Dec 6, 2021

Hubble telescope captures stunning image of the star-forming Prawn Nebula

Posted by in category: space

The Prawn Nebula is an emission nebula located 6,000 light-years from Earth. A new Hubble Space Telescope image captures a stunning view of the nebula’s vast star-forming region.

Dec 6, 2021

Hackers take $196 million from crypto exchange Bitmart, security firm says

Posted by in categories: bitcoin, cybercrime/malcode

Hackers have taken $196 million from crypto trading platform Bitmart, a security firm said Saturday.

Bitmart confirmed the hack in an official statement Saturday night, calling it “a large-scale security breach” and writing that hackers withdrew about $150 million in assets. However, blockchain security and data analytics firm Peckshield estimates that the loss is closer to $200 million.

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