Can you solve the alien pyramid riddle? - Henri Picciotto
![](https://i.ytimg.com/vi/Ya9S6PyC1Sg/mqdefault.jpg)
5:18
Can you solve the time traveling car riddle? - Dan Finkel
![](https://i.ytimg.com/vi/0l5ftgEQUjM/mqdefault.jpg)
5:07
Can you solve the giant spider riddle? - Dan Finkel
![](https://i.ytimg.com/vi/i0WH4SFpeB8/mqdefault.jpg)
5:54
Can you solve the computer virus riddle? - James Tanton
![](https://i.ytimg.com/vi/4N_OKzSNcmQ/mqdefault.jpg)
20:02
Miss bendy straws some one must know how to make one bio degrade in the sea in under a day.
![](https://i.ytimg.com/vi/9zCH37330f8/mqdefault.jpg)
15:14
The Real Reason Why You Have Allergies
![](https://i.ytimg.com/vi/Es8K2G5XscU/mqdefault.jpg)
16:06
I Tested 1-Star Pianos
![](https://i.ytimg.com/vi/P_fHJIYENdI/mqdefault.jpg)
24:52
The Most Useful Thing AI Has Done
![](https://i.ytimg.com/vi/qgvmJTmJIKs/mqdefault.jpg)
5:08