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Chris Hadfield
Retired Canadian Astronaut & Author
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Tom Arnold and Moral Responsibility

Question: Does the North have moral duty to improve living conditions in the South?

Arnold:    I do think there’s a deep moral responsibility that, you know, as the Good Book says, I am my brother’s keeper.  I think, to some extent, there is that.  Of course, the developed world can only do so much.  At the end of the day, developing countries have to take their own responsibility, their political leaders.  They have to be the ones that set the standards, that implement the policies, and I think what has happened over recent years, particularly since the Millennium Development Goals have been agreed, there’s been a greater sense of interdependence of responsibility.  The primary responsibility and the primary ownership for development has to rest with the countries themselves, with the politicians and the people of those countries.  But then, we do need to help those countries in structured and sustained way in order to, you know, in order to achieve development.

The CEO says developed countries do have an obligation to less developed countries.

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The mind-blowing science of black holes

What we know about black holes is both fascinating and scary.

Videos
  • When it comes to black holes, science simultaneously knows so much and so little, which is why they are so fascinating. Focusing on what we do know, this group of astronomers, educators, and physicists share some of the most incredible facts about the powerful and mysterious objects.
  • A black hole is so massive that light (and anything else it swallows) can't escape, says Bill Nye. You can't see a black hole, theoretical physicists Michio Kaku and Christophe Galfard explain, because it is too dark. What you can see, however, is the distortion of light around it caused by its extreme gravity.
  • Explaining one unsettling concept from astrophysics called spaghettification, astronomer Michelle Thaller says that "If you got close to a black hole there would be tides over your body that small that would rip you apart into basically a strand of spaghetti that would fall down the black hole."

Space travel could create language unintelligible to people on Earth

A new study looks at what would happen to human language on a long journey to other star systems.

Credit: NASA Ames Research Center.
Surprising Science
  • A new study proposes that language could change dramatically on long space voyages.
  • Spacefaring people might lose the ability to understand the people of Earth.
  • This scenario is of particular concern for potential "generation ships".
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Scientists see 'rarest event ever recorded' in search for dark matter

The team caught a glimpse of a process that takes 18,000,000,000,000,000,000,000 years.

Image source: Pixabay
Surprising Science
  • In Italy, a team of scientists is using a highly sophisticated detector to hunt for dark matter.
  • The team observed an ultra-rare particle interaction that reveals the half-life of a xenon-124 atom to be 18 sextillion years.
  • The half-life of a process is how long it takes for half of the radioactive nuclei present in a sample to decay.
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Your emotions are the new hot commodity — and there’s an app for that

Many of the most popular apps are about self-improvement.

Drew Angerer/Getty Images
Personal Growth

Emotions are the newest hot commodity, and we can't get enough.

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