On America

Question: Will America get a president who can engage citizens?

Michael York:  Wow.  That is a consummation devoutly to be wished, as Hamlet said.  And I'm not sure it's the president's function.  I would like to think that someone sets the example and it sort of trickles down and that the funding opportunities are there.  Obviously you know, in Washington there is the Kennedy Center you know, as a sort of focus of what can happen when you have an enlightened president who sees the value of the performing arts.  And we are at this extraordinary stage in American life where we are about to elect a president and it's a very important choice,  where you know, whether having spent a lot of the country's wealth on funding wars and keeping us secure, which is very, very important, not to be denied.  You just have a feeling that the wealth should be shared among things that not just, you know, don't just simply make people.  But make them extraordinary and you know, educated and enlightened.  And all those things that you know, that are enshrined in that-- in the phrase of the constitution about the pursuit of happiness, which I think you know, concentrating on war does not do.

York quotes Hamlet: "A consummation devoutly to be wished."

The power of authority: how easily we do what we’re told

Milgram's experiment is rightly famous, but does it show what we think it does?

Credit: MEHDI FEDOUACH via Getty Images
Mind & Brain
  • In the 1960s, Stanley Milgram was sure that good, law-abiding Americans would never be able to follow orders like the Germans in the Holocaust.
  • His experiments proved him spectacularly wrong. They showed just how many of us are willing to do evil if only we're told to by an authority figure.
  • Yet, parts of the experiment were set up in such a way that we should perhaps conclude something a bit more nuanced.
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We're winning the war on cancer

As the American population grows, fewer people will die of cancer.

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Surprising Science
  • A new study projects that cancer deaths will decrease in relative and absolute terms by 2040.
  • The biggest decrease will be among lung cancer deaths, which are predicted to fall by 50 percent.
  • Cancer is like terrorism: we cannot eliminate it entirely, but we can minimize its influence.
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Golden blood: The rarest blood in the world

We explore the history of blood types and how they are classified to find out what makes the Rh-null type important to science and dangerous for those who live with it.

Abid Katib/Getty Images
Surprising Science
  • Fewer than 50 people worldwide have 'golden blood' — or Rh-null.
  • Blood is considered Rh-null if it lacks all of the 61 possible antigens in the Rh system.
  • It's also very dangerous to live with this blood type, as so few people have it.
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China's "artificial sun" sets new record for fusion power

China has reached a new record for nuclear fusion at 120 million degrees Celsius.

Credit: STR via Getty Images
Technology & Innovation

This article was originally published on our sister site, Freethink.

China wants to build a mini-star on Earth and house it in a reactor. Many teams across the globe have this same bold goal --- which would create unlimited clean energy via nuclear fusion.

But according to Chinese state media, New Atlas reports, the team at the Experimental Advanced Superconducting Tokamak (EAST) has set a new world record: temperatures of 120 million degrees Celsius for 101 seconds.

Yeah, that's hot. So what? Nuclear fusion reactions require an insane amount of heat and pressure --- a temperature environment similar to the sun, which is approximately 150 million degrees C.

If scientists can essentially build a sun on Earth, they can create endless energy by mimicking how the sun does it.

If scientists can essentially build a sun on Earth, they can create endless energy by mimicking how the sun does it. In nuclear fusion, the extreme heat and pressure create a plasma. Then, within that plasma, two or more hydrogen nuclei crash together, merge into a heavier atom, and release a ton of energy in the process.

Nuclear fusion milestones: The team at EAST built a giant metal torus (similar in shape to a giant donut) with a series of magnetic coils. The coils hold hot plasma where the reactions occur. They've reached many milestones along the way.

According to New Atlas, in 2016, the scientists at EAST could heat hydrogen plasma to roughly 50 million degrees C for 102 seconds. Two years later, they reached 100 million degrees for 10 seconds.

The temperatures are impressive, but the short reaction times, and lack of pressure are another obstacle. Fusion is simple for the sun, because stars are massive and gravity provides even pressure all over the surface. The pressure squeezes hydrogen gas in the sun's core so immensely that several nuclei combine to form one atom, releasing energy.

But on Earth, we have to supply all of the pressure to keep the reaction going, and it has to be perfectly even. It's hard to do this for any length of time, and it uses a ton of energy. So the reactions usually fizzle out in minutes or seconds.

Still, the latest record of 120 million degrees and 101 seconds is one more step toward sustaining longer and hotter reactions.

Why does this matter? No one denies that humankind needs a clean, unlimited source of energy.

We all recognize that oil and gas are limited resources. But even wind and solar power --- renewable energies --- are fundamentally limited. They are dependent upon a breezy day or a cloudless sky, which we can't always count on.

Nuclear fusion is clean, safe, and environmentally sustainable --- its fuel is a nearly limitless resource since it is simply hydrogen (which can be easily made from water).

With each new milestone, we are creeping closer and closer to a breakthrough for unlimited, clean energy.

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