The ALS Ice Bucket Challenge takes over the world

Samuel L. Jackson calls on the stars of the Ice Bucket Challenge to sing against 'racist police'

'Come on, sing it out!'

ALS Association abandons its effort to trademark the 'ice bucket challenge'

Group says it's no longer trying to own the phrase, despite fraud concerns

Trademarking charity: ALS Association wants to own 'Ice Bucket Challenge'

David Lynch's Ice Bucket Challenge video is very Lynchian

Coffee, a trumpet, and an unexpected challenge

Rubble Bucket Challenge aims to raise awareness about Gaza

Social media campaign puts a sobering twist on the Ice Bucket Challenge as Gaza death toll passes 2,100

Patrick Stewart does the ALS Ice Bucket Challenge the right way

Samsung couldn't resist turning the ALS Ice Bucket Challenge into an ad

Dr. Dre accepts Tim Cook's ice bucket challenge and nominates Eminem and Snoop next

"I gotta admit, it was a little bit shocking."

Lady Gaga does the creepiest Ice Bucket Challenge yet

Amazon CEO Jeff Bezos takes the Ice Bucket Challenge and dares 'Star Trek' stars to go next

Bezos does standup on Edward Snowden, the Pope, and Kim Jong-un

Bill Gates wins the Ice Bucket Challenge with ridiculous machine

The best Ice Bucket Challenge videos from the rich and famous

Google's Larry Page and Sergey Brin take on the ice bucket challenge

That's a lot of ice

Watch Apple CEO Tim Cook take the ice bucket challenge

Here's why famous people are dumping ice water on their heads

You've probably seen a good number of photos this week of the rich and famous dumping buckets of ice water over their heads. Here's why.

Bucket of ice water slowly creeping toward Tim Cook's head

Apple exec Phil Schiller dumped water on his head for charity, then challenged the CEO

Twitter CEO Dick Costolo dumps ice-cold water on his head like it was a light spring rain

Costolo and other tech luminaries are taking the "ice bucket challenge"

Mark Zuckerberg pours ice-cold water on himself, challenges Bill Gates to do the same

Facebook CEO follows Satya Nadella in charity campaign

Microsoft's CEO takes the ice bucket challenge, wins gloriously

Satya Nadella is raising money to fight ALS — and challenges Jeff Bezos and Larry Page to join him