20K views · 203 reactions | 21-Camera Sharknado! Testing if sharks will attack your underwater selfie. | Mark Rober | Facebook
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51K views · 487 reactions | Can sharks smell blood from a mile away? 樂 YouTuber, inventor, and former NASA engineer Mark Rober is teaming up with marine biologist #LukeTipple to get a definitive answer to that question by running a few tests... Even if it means using their OWN blood 喝 Watch Shark Rober at 11:30p ET on Discovery and streaming on discovery+! | Shark Week | Facebook
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344K views · 6.8K reactions | Just how dirty is your pool?  | Mark Rober | Facebook
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Since I was a little kid I always wondered what it would be like to swim in a pool of Jello 🤔 | Mark Rober
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24M views · 292K reactions | Pee in Pool Experiment - Scientific Method 六‍ | Mark Rober | Facebook
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