April Fool’s Day has made for some strange headlines.

The Post’s Hayley Tsukuyama covers Monday’s pranks from technology companies, including Google’s announcement that a new search engine, Google Nose, will allow users to smell search results in a “15 million scentabyte database”:

The video announcing the service parodies Google’s usual dramatic, musical product announcement, and shows interviews with project managers and engineers. The company is nothing if not self-aware.

The White House released this clip in observance of the holiday:

The video starts with a shot of the White House briefing room. Kid President — aka Robby Novak, a 9-year-old Tennessee resident and viral video maker – rises from behind the podium.

“April Fools on all y’all,” he announces.

More political hijinks came from the candidates in Virginia’s gubernatorial race, but these were not so light-hearted. In a fake news release, Virginia Attorney General Ken Cuccinelli’s campaign said that Democratic candidate Terry McAuliffe was not committed to bringing business to Virginia. McAuliffe’s campaign responded with a fake release referring to Cuccinelli’s shares in a company that had sued the state. (Read the story here.)

Post reporters pulled a couple of hoaxes of their own. John Kelly’s column described a visit to an abandoned nineteenth-century subway station 60 feet beneath M Street NW.

The light illuminated a cathedral-like space. The walls were covered in light green tile and inset every 20 feet or so with wooden benches. A wrought-iron railing ran along the platform’s edge, interrupted at regular intervals with sliding gates. Above an ornate booth was an enameled metal sign reading “TICKETS.”

Book critic Ron Charles, playing an Apple employee, pretended to announce in a video that the company had patented the alphabet.

Wonkblog asks whether the economy is playing along, too:

In 2012 and 2011, seemingly strong momentum in the first half of the year gave way to summer slumps. Will the third try be the charm? Or is this just another prank — one that’s getting old fast. We evaluate the evidence.

Visit the Guardian for a review of April Fool’s Day in England.