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Big ideas in science and math. Because you want to know more. Launched by . Newsletter:

Vrijeme pridruživanja: listopad 2012.

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  1. ICYMI: When Earth’s oxygen levels rose, animals got bigger and more complex. But one scientist thinks we have the order of events wrong.

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  2. ICYMI: For millennia, mathematicians have wondered what sort of circumstances would allow us to represent irrational numbers that go on forever — like pi — with simple fractions. Now we have an answer:

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  3. ICYMI: Five years ago, researchers used GWAS to show evidence for natural selection acting on certain traits. Now, those results, and the methods that produced them, are being called into question.

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  4. ICYMI: An experiment that shows how entropy can decrease might help illuminate a long-standing puzzle about the start of the universe.

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  5. ICYMI: How does a black hole respond to a good shake? To find the answer, you’ll need a coordinate system that properly maps space-time.

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  6. ICYMI: It’s hard to create quantum versions of some of the most important algorithms running on classical computers. Recent research offers hope:

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  7. ICYMI: We spoke with asteroid researcher Meenakshi Wadhwa about deciphering Mars’s ancient past, the hunt for new material from space, and the challenges of being a woman in science.

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  8. ICYMI: “Hemoglobins predate the origin of animals and even predate the common ancestor of animals and plants.” — Mark Siddall, American Museum of Natural History. This brief history of blood explains why that pigment is so universally useful.

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  9. In this week’s episode of “The Joy of x,” mathematician Alex Kontorovich talks with host Steven Strogatz about the anti-authoritarianism of proof, the illusion of parallel lines, and finding the courage to be creatively wrong. Here’s a preview:

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  10. Interstellar visitors like ʻOumuamua and 2I/Borisov might soon have much to tell us about planetary formation and the conditions near distant stars — or even within other galaxies.

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  11. The cosmic microwave background is “definitely one of, if not the most important, pillar of modern cosmology.” —Yacine Ali-Haïmoud, an astrophysicist at New York University.

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  12. ICYMI: Rank measures how many rational solutions to an equation one needs in order to find every other rational solution. For decades, mathematicians believed there was no limit to the rank of an elliptic curve. Not so, says a new model.

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  13. The partnership between the brain’s neurons and the glial cells that support them is mysterious. Glia are turning out to have a complexity that rivals that of neurons, and they are crucial to some quintessentially neural phenomena like perceiving pain.

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  14. Artificial intelligence has the same problem as a genie in a bottle: We can tell it what we want, but our stated wishes might not perfectly reflect our true desires.

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  15. From the archives: Entropy, an idea often equated with disorder, can actually organize things.

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  16. ICYMI: In an embryo, cells often start by dividing unevenly, which allows them to become different types of tissues. How do they finally commit to one fate? Sometimes it’s when the cells become so small that they can’t divide asymmetrically anymore.

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  17. ICYMI: “In many areas of mathematics you’re looking for examples of something, and examples are really abundant, but somehow any time you try to write down an example, you get it wrong.” — mathematician Dave Jensen

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  18. From the archives: Equiangular lines are an elemental part of geometry. Mathematicians have discovered a tighter limit on the number of such lines that exist in every dimension.

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  19. Uncertainty about what humans really want, and the need to look to us for guidance, could be the key to preventing artificially intelligent machines from doing harm.

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  20. ICYMI: By synthesizing more complex molecular knots, chemists are hoping to glean insights into their physical and even biological properties.

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