The Top 100 April Fool's Day Hoaxes of All Time!

[cousinlucky]

As judged by notoriety, absurdity, and number of people duped.

http://www.museumofhoaxes.com/hoax/aprilfool/P1/

[bigtomrodney]

Did you see this on the google homepage today?

Google TiSP

[Vergil83]

omgponies!

[benjamin20]

ford Lincoln mercury memorial

[Vergil83]

I just saw this pretty good one
The Sheep Albedo Feedback

The hypothesis begins with the simple observation that most sheep are white, and therefore have a higher albedo than the land on which they typically graze (see figure below). This effect is confirmed by the recent Sheep Radiation Budget Experiment. The next step in the chain of logic is to note that the sheep population of New Zealand has plummeted in recent years. The resulting decrease in albedo leads to an increase in absorbed Solar radiation, thus warming the planet. The Sheep Albedo hypothesis draws some inspiration from the earlier work of Squeak and Diddlesworth [2] on the effect of the ptarmigan population on the energy balance of the Laurentide ice sheet. Noh-Watt hastens to emphasize that the two hypotheses are quite distinct, since the species of ptarmigan involved in the Squeak-Diddlesworth effect is now extinct.