Mark Rober's CrunchLabs

1. 

   E1. Lava vs Laser Destruction Test

   Mar 16, 2026 · 24m

   What's the most destructive substance on Earth? Lava's the reigning champ - but how do lasers stack up? Mark and his friends are about to find out.

2. 

   E2. Backyard Squirrel 2.0 - Bank Heist

   Mar 16, 2026 · 18m

   Mark ups his backyard obstacle course game to keep four thieving squirrels away from a bank vault full of birdseed and a lifetime supply of walnuts.

3. 

   E3. Building a Liquid Sand Hot Tub

   Mar 16, 2026 · 10m

   With the right amount of forced air, a hot tub filled with sand can look like a bubbling pot of soup. But how? Mark breaks down the science behind it.

4. 

   E4. This Ball Is Impossible to Hit

   Mar 16, 2026 · 24m

   Mark uses the magic of engineering to level the playing field in a stacked competition against the world's greatest wiffle ball players.

5. 

   E5. Vortex Cannon vs Drone

   Mar 16, 2026 · 22m

   Mark explores the possibilities of anti-drone defense technologies with a crew of backyard YouTube engineers... and the world's largest vortex cannon.

6. 

   E6. Glitter Bomb 1.0 vs Porch Pirates

   Mar 16, 2026 · 9m

   Stolen packages? Not so fast. Mark builds the original "Glitter Bomb" trap to combat porch pirates-and really make them regret their life choices.

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