"I Am" is meant to challenge our ideas of what constitutes meaning, according to sculptor Salvatore Garau.Instagram/salvatore_garauSalvatore Garau described his immaterial sculpture as a “concentrate of thoughts.” Our definition of art has been in constant flux. From the very first cave paintings to motion pictures and the advent of downloadable music, the form is ever-changing. It now appears that the constant of being able to actually observe the art is, too — as the world’s first invisible sculpture just sold for $18,300.

Joan of Leeds created a makeshift dummy to throw Archbishop Melton off track. She then fled to a town 30 miles away and was never seen again.Committing to the lifelong pursuit of being a nun and living in a convent is one that requires extreme commitment — particularly in the 14th century. For Joan of Leeds, a rather rebellious English nun at St. Clement’s Nunnery in Yorke, a change in pursuits required extreme measures — namely, escape.

While many of us are grateful for the 40-hour work week, Medieval peasants worked far less than even that.Wikimedia CommonsCelebrating Peasants from the 18th or 19th century depicts a fairly jovial atmosphere at work. When professor Juliet Schor released her book, The Overworked American: The Unexpected Decline of Leisure, the average American was shocked. According to her research, they were working more days and taking fewer vacation days than a medieval peasant.

"They're saying that this foster care provider is better for the child because she can provide more financially, provide better education, things like that," an advocate for the couple said. "If we're going on that train, Bill Gates should take my children."GoFundMeAmy Fabbrini and Eric Ziegler At what point does the government get to determine who makes a sufficient parent? That’s the question brought to the table in an unusual Oregon custody case.

San Francisco has deployed a "poop patrol" to clean up the growing amount of feces on its sidewalks thanks to the homelessness epidemic.David McNew/Getty ImagesSan Francisco’s growing number of homeless people has caused a problem with public defectation. Number two is becoming San Francisco’s number one problem. The city has been experiencing a growing problem of public pooping on its streets by the local homeless population and it’s now becoming a major public health concern.

With World War II nearing its end in the early months of 1945, hundreds of Japanese soldiers perished during the Ramree Island crocodile attack, the deadliest in recorded history.Imagine you’re part of a military force outflanked by the enemy on a tropical island. You have to rendezvous with another group of soldiers on the other side of the island — but the only way to do so is to traverse a thick swamp filled with deadly crocodiles.

The reptile is a flapshell turtle, which is usually born with brown and green hues.TwitterThis albino golden flapshell certainly looks like it should be sitting between two slices of bread. The Indian Forest Service has just announced the discovery of a particularly strange kind of turtle — one that looks like a stack of molten American cheese. Typically, this species of golden flapshell turtle is dark green and brown. But according to ScienceAlert, a genetic anomaly has caused its jarring appearance.

The 1918 Spanish flu pandemic, the deadliest of its kind in history, affected one in four people worldwide and claimed 50 million lives. For the U.S., the Spanish flu is believed to have started in Kansas in January 1918, though the global origin point remains uncertain.Charles McCain With modern medicine still in its infancy, many misunderstood how individuals could contract and spread this illness, and doctors often misdiagnosed it given its similarity to the common cold.

The monkey is a capuchin named Gia and belongs to Danielle Thomas, who once performed pole dance routines with it under the name "Pole Assassin."Monkey Gia/InstagramThe monkey, Gia, is Danielle’ Thomas’s emotional support animal and fellow performer. On the day after Halloween, a photographer in Texas posted a tweet with an eyebrow-raising scandal. He claimed that a monkey belonging to Texas Longhorns’ special teams coach Jeff Banks had viciously attacked a trick-or-treater on Halloween.

There’s cold and then there’s Antarctica. Ted Scambos/NSIDC/CU BoulderThe East Antarctic Plateau. It’s the coldest place on Earth. And as it turns out, it’s even colder than we thought. In 2013, based on remote satellite data scientists announced that they had found surface temperatures of -135 degrees fahrenheit on a snowy plateau in East Antarctica, which is the coldest place on earth. However, a new study with updated data has found that the coldest site has actually reached an unbelievable -144 degrees fahrenheit.