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Ep. 447: Animals in Space Pt. 3: Dogs, Monkeys and More

For the final episode in our 3-part episode about animals in space, we look at the largest animals to go to orbit. And I’ll just warn you now, this is going to be a really sad episode. We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/ 20:30 PM UTC […]

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Ep. 446: Animals in Space Pt. 2: Mice and Other Small Animals

Last week we talked about how the smallest creatures behave in space, but now we move up in size a little to small animals, like mice. What missions have they flown on, and how does microgravity affect their biology? We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/ 20:30 […]

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Ep. 445: Animals in Space Pt. 1: Insects and Arachnids

We’ve talked about animals traveling to space in the past, but it’s time to take another look, with many other creatures making the trip to the void. Today we’re going to talk about the spineless insects and arthropods, and those tough-as-nails waterbears – tardigrades. We usually record Astronomy Cast every Friday at 1:30 pm PDT […]

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Ep. 432: Geoglogic Ages of Mars – From Wet and Wild to Desolate Desert

Today, Mars is a desolate wasteland, with dusty red rocks and sand stretching out to the horizon. But billions of years ago, it was a vastly different world. It was blue, with oceans, rivers, lakes, and maybe life? Let’s tell the story of geology on Mars, and we got from that world to the one […]

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Ep. 419: DragonCon 2016 Live – Rocket Girls

Welcome back to our new season of Astronomy Cast! This episode is a special live show that took place at DragonCon 2016 in Atlanta, GA. Pamela hosted a panel of amazing scientists and engineers who all happen to be women, and they discussed the unsung women of NASA and the early Space Age and their […]

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Ep. 376: The Miller-Urey Experiment

Evolution explains how life adapts and evolves over eons. But how did life originate? Chemists Miller and Urey put the raw chemicals of life into a solution, applied an electric charge, and created amino acids – the building blocks of life. Download the show [MP3] | Jump to Shownotes | Jump to Transcript (more…)

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Ep. 372: The Millikan Oil Drop

In 1909 Robert Millikan devised an ingenious experiment to figure out the charge of an electron using a drop of oil. Let’s talk about this Nobel Prize winning experiment. Download the show [MP3] | Jump to Shownotes | Jump to Transcript (more…)

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Ep. 371: Eddington Eclipse Experiment

At the turn of the 20th Century, Einstein’s theory of relativity stunned the physics world, but the experimental evidence needed to be found. And so, in 1919, another respected astronomer, Arthur Eddington, observed the deflection of stars by the gravity of the Sun during a solar eclipse. Here’s the story of that famous experiment. Download […]

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Ep. 370: The Kaufmann–Bucherer–Neumann Experiments

One of the most amazing implications of Einstein’s relativity is the fact that the inertial mass of an object depends on its velocity. That sounds like a difficult thing to test, but that’s exactly what happened through a series of experiments performed by Kaufmann, Bucherer, Neumann and others. Download the show [MP3] | Jump to […]

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Ep. 369: The Fizeau Experiment

Light is tricky stuff, and it took scientists hundreds of years to puzzle out what this stuff is. But they poked and prodded at it with many clever experiments to try to measure its speed, motion and interaction with the rest of the Universe. For example, the Fizeau Experiment, which ran light through moving water […]

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