Ask the Naked Scientists Ask the Naked Scientists

Why a helium balloon flies backwards when you hit the brakes

Jul 24, 2026 · 25m

Summary

Dr. Chris Smith answers listener questions on diverse scientific topics, including magnetic algae for targeted cancer drug delivery and the physics of helium balloons in cars. He explains stellar fusion, the effects of gallbladder removal on cholesterol, and potential symbiotic relationships between spiders and antelopes. The episode also covers cloud seeding impacts, restless legs syndrome, sperm count declines, and the expansion of the universe, concluding with an explanation of evolution versus intelligent design.

Topics discussed

Introduction and algae-based drug delivery for bladder cancer Physics of helium balloons in accelerating cars Why the sun does not burn out to ash Effects of gallbladder removal on cholesterol Symbiotic spider webs on oryx horns Cloud seeding and its impact on regional rainfall Causes and treatments for restless legs syndrome Why sperm can form gelatinous clumps What holds the universe together: gravity vs dark energy Declining sperm counts and rising infertility rates Evolution vs intelligent design and sickle cell anemia
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