Outrageous Acts of Science is a science program shown on Science Channel in the United States, featuring a fast-paced countdown of the top 20 internet videos in each episode. The series first aired in the United Kingdom on Discovery International with the title You Have Been Warned. The program features homemade science experiments and stunts, often accompanied by warnings of "don't try this at home" when doing so might endanger the viewer. For the U.S. TV network, it was the top-rated show of 2015.

Each episode focuses on a particular science theme that features the cleverest, funniest, most daring, or just downright bizarre clips, along with an explanation and breakdown from science and engineering experts, including Hakeem Oluseyi, Debbie Berebichez, Carin Bondar and also-comedians Helen Arney, Matt Parker, Adam Ruben, and Tom Wrigglesworth, among others. The expert panel's explanations are accompanied by storytelling motion graphics and an explanation of what, how and why these clips were scientifically possible.

Outrageous Acts of Science is narrated by Tim Dadabo, while Gareth Cornick voices You Have Been Warned for Europe. In mid 2017, the last ten episodes of season seven aired on Discovery Channel (Australia) as Dr. Karl's Outrageous Acts of Science, hosted by Dr. Karl Kruszelnicki, with commentary by other Australians not seen in other versions of the show.

The first two seasons of You Have Been Warned are shown in Asia as well, with the third season of Outrageous Acts also airing there under the You Have Been Warned banner and intro. Two separate Asian versions were also created. In the first, titled You Have Been Warned with Ean Nasrun, Malaysian radio announcer and TV personality Ean Nasrun voices and appears on-screen in a separate version that aired on Discovery Channel Asia, along with some commentators' clips replaced by those featuring scientists from Malaysia. A second independent version, You Have Been Warned Asia, is also produced by Rohit Tharani for Discovery Channel Asia, hosted by five Filipinos, actor/comedian Ramon Bautista; director and performer RA Rivera; comedic performer Jun Sabayton; musician, TV presenter, and political commentator Lourd de Veyra; and actress, TV presenter, and motoring journalist Angel Rivero. The hosts provide the science behind the clips themselves rather than relying in a separate commentator panel in an edgier, more comedic take on the series.

The series is produced by October Films UK. In its tenth season, new episodes began airing in the U.S. on 17 October 2018. The first four episodes of season six were compilations of previous clips.

A one-season spin-off called Outrageous Acts of Psych aired in the U.S. in 2015.