Will There Always Be a North Star?

When dark spots appear on the surface of the Sun, we're actually seeing the result of massive distortions in solar magnetic fields caused by roiling plasma -- and they appear in regular(ish) 11-year cycles. Learn what we know (and don't know!) about sunspots in today's episode of ...  Afficher plus

A sunken continent called Lemuria was first proposed as a scientific explanation for lemur populations in the mid-1800s, but it quickly became part of the mythology of Theosophist mystics and Tamil cultural activists alike. Learn the truth and myths behind Lemuria (plus what Darw ...  Afficher plus

Soon after the sun sets on winter nights, if you live in the northern hemisphere you can look into the sky and find the Orion constellation near the eastern horizon. Astrophysicist Sarafina El-Badry Nance has always been drawn to a particular star in Orion: Betelgeuse, a red supe ...  Afficher plus

What are neutron stars, pulsars and magnetars?

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How many stars can we see in the sky? Thousands? Billions?

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Is your compass actually wrong? Neil deGrasse Tyson and comedian Chuck Nice explore magnetic fields, why clocks go clockwise, and how phone numbers got their area codes.

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