The Best April Fools' Day Hoaxes of 2011

April 1, 2011— -- When the Swiss spaghetti trees are once again in bloom and Antarctica's penguins have completed their annual migration from the rain forest, it can only mean one thing; it's April Fools' Day.

Some of the world's leading corporations and media outlets today unleashed a series of ambitious and hysterical pranks on a suspecting but still gullible public.

There are plenty of hoaxes circulating the Internet today but, as always, there's also plenty of real news too wacky to be fake.

So here's today's challenge from the honest people at ABCNews.com. One of the following stories out today is true, the other four are pranks.

Your mission: Read the following stories and vote for the one you believe is true.

To learn which of these stories is true, tune in tonight to World News with Diane Sawyer or check back here after 7 p.m. ET.

1. Child-Free Flights. Discount Irish airline Ryanair, known for its creative promotions and cost-cutting measures, including coin-operated toilets, is offering flights free of screaming babies and unruly children. For a small premium, travelers can buy a seat on "child-free flights."

"With clear demand for child-free flights, Ryanair will introduce child-free flights on high-frequency routes from the start of our winter schedule in October," the airline announced in a news release.

2. Google Motion. Google today announced a new technological advance in its popular Gmail application, motion-controlled email. "When it comes to email, we still rely on outdated technologies like the keyboard and mouse," Paul McDonald, product manager for Gmail, said in a online video.

Google Motion uses "your computer's camera and a special tracking algorithm" to turn your physical moves into "actionable commands."

Want to open a message? "Make a motion like you're opening an envelope." To reply, "simply point backward with your thumb."

3. PBS Launches Ann Coulter Show. After weeks of controversy and condemnation by Republican lawmakers that the Corporation for Public Broadcasting does not feature enough conservative points of view, PBS has given firebrand Ann Coulter her own show.