The Infinite Hotel Paradox - Jeff Dekofsky

(6:)

无限旅馆悖论 - Jeff Dekofsky

(6:1econd)

Einstein's twin paradox explained - Amber Stuver

(6:16)

The Boltzmann brain paradox - Fabio Pacucci

(5:40)

How An Infinite Hotel Ran Out Of Room

(6:7)

How big is infinity? - Dennis Wildfogel

(7:13)

宇宙的黑暗真相：現實or虛幻？原來，科學家們早已發現了坐在山巔上的玄學家，而這一切故事，我們從400年前的一顆光子説起……|自說自話的總裁

(27:50)

Trade tariff turmoil pushes Canada to rethink US ties | DW News

(14:16)

The Banach–Tarski Paradox

(24:14)

Would you pass the wallet test?

(5:35)

Can you solve the wizard standoff riddle? - Dan Finkel

(5:26)

为什么说3+4等于5？奇怪的“楼梯悖论”，难倒了不少数学家？

(5:31)

A brief history of banned numbers - Alessandra King

(4:43)

Why Can't We See Evidence of Alien Life?

(6:4)

The paradox at the heart of mathematics: Gödel's Incompleteness Theorem - Marcus du Sautoy

(5:20)

Half the universe was missing... until now

(14:10)

What's invisible? More than you think - John Lloyd

(8:48)

如果地球上的所有人突然消失，会发生什么？ - Dan Kwartler

(5:22)

Are all of your memories real? - Daniel L. Schacter

(5:18)

费米悖论 - 外星人都在哪里？ （1/2）

(6:21)

无穷大和无穷大+1谁更大？直线上的点多还是平面上的点多？李永乐老师讲神奇的希尔伯特旅馆

(11:11)

Why can't you divide by zero? - TED-Ed

(4:51)

What staying up all night does to your brain - Anna Rothschild

(5:37)