If March 15 Is the Ides of March, What Does That Make March 16?

iStock.com/bycostello
iStock.com/bycostello

Everyone knows that the soothsayer in William Shakespeare's Julius Caesar was talking about March 15 when he warned the Roman emperor to "beware the Ides of March." We also all know Caesar's response: "Nah, I gotta head into the office that day." But if March 15 is the Ides of March, what does that make March 16?

At the time of Caesar's assassination, Romans were using the Julian calendar (introduced by Julius Caesar himself). This was a modified version of the original Roman calendar, and it is very similar to the one we use today (which is called the Gregorian calendar). A major difference, however, was how Romans talked about the days.

Each month had three important dates: the Kalends (first day of the month), the Ides (the middle of the month), and the Nones (ninth day before the Ides, which corresponded with the first phase of the Moon). Instead of counting up (i.e., March 10, March 11, March 12), Romans kept track by counting backwards and inclusively from the Kalends, Ides, or Nones. March 10 was the sixth day before the Ides of March, March 11 was the fifth day before the Ides of March, and so on.

Because it came after the Ides, March 16 would’ve been referred to in the context of April: "The 17th day before the Kalends of April." The abbreviated form of this was a.d. XVII Kal. Apr., with "a.d." standing for ante diem, meaning roughly "the day before."

So, had Julius Caesar been murdered on March 16, the soothsayer's ominous warning would have been, "Beware the 17th day before the Kalends of April." Doesn't have quite the same ring to it.

This story first ran in 2016.

Family Game Night Just Got a Lot Cozier With This Inflatable Twister Game

Hammacher Schlemmer & Company
Hammacher Schlemmer & Company

With the potential for strained muscles and painful tumbles on your living room floor, Twister doesn't have a reputation for being the most comfortable board game. This unofficial version of the activity should hopefully lead to less bruising. As PopSugar reports, Hammacher Schlemmer & Company has upgraded the classic Twister mat to become a giant, inflatable play-board.

The inflatable game has all the elements of the original Twister: There are red, green, yellow, and blue dots (16 of each color) lined up on a white surface and a spinning wheel that shows you which limb to place where.

Normally the board is a flat sheet, but this one resembles a super-sized blow-up mattress. It measures 15 feet long, 15 feet wide, and 15 inches tall. A 1-hp air blower is included, and you can keep it running as you play so you don't have to worry about the board deflating and throwing off your balance. The game, which is capable of supporting up to 1500 pounds, is the perfect outdoor party accessory.

Contorting your body in relative comfort will cost you: The inflatable game costs $2000—about 100 times the price of a regular Twister board. If you can't resist adding it to your game collection, you can order it from Hammacher Schlemmer's website.

[h/t PopSugar]

The Bird or Bunny Optical Illusion Could Have You Second-Guessing Your Eyesight

jamesvancouver/iStock via Getty Images
jamesvancouver/iStock via Getty Images

The internet can't resist a mind-bending illusion. Some of the most popular ones to go viral feature content that can be interpreted two ways: The infamous dress ignited a web-wide controversy over whether it was black and blue or white and gold, and the "yanny or laurel" audio clip messed with people's ears instead of their eyes. The latest illusion the internet can't agree on is a video of someone petting a raven—or is it a rabbit? Watch the clip below and decide for yourself.

Paige Davis, the curator of bird training at the World Bird Sanctuary, shared this video of a white-necked raven more than two years ago. A biological psychiatry researcher named Dan Quintana recently found the clip on Imgur's Twitter account and tweeted it with the caption: "Rabbits love getting stroked on their nose."

"By first directing the viewer's attention to the nose, I was trying to distract viewers from the ears/beak, one of the clear giveaways that this was a video of a raven," Quintana wrote in a blog post.

With its head tilted back, it's easy to mistake the raven's beak for bunny ears and the top of its head for a nose. But a few details—like its translucent nictitating membrane that closes across the eye horizontally—indicate that it's really a bird.

This video is a real-life version of one of the most famous illustrated illusions of all time. Like the raven vs. rabbit clip, this drawing, sketched by American psychologist Joseph Jastrow in 1899, depicts either a duck facing left or a bunny facing right. There is no "right" way to view this illusion: Jastrow drew it to see how fast viewers could switch from one perception to the other.

Even though we know which animal the subject of this latest illusion really is, it still works with Jastrow's test: Watch the clip again and see if you can force your mind to go back and forth between seeing a bird and a rabbit. After that exercise, here are some more optical illusions to break your brain.

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