A demonstrator wears a mask during a protest inside the Bay Area Rapid Transit (BART) Civic Center station on August 15, 2011 in San Francisco, California. The hacker group “Anonymous” staged a demonstration at a BART station this evening after BART officials turned off cell phne service in its stations last week during a disruptive protest following a fatal shooting of a man by BART police. (Photo by Justin Sullivan/Getty Images)

Lilith interacts with spectators in the streets of Toulouse. French street show creator Francois Delaroziere, director of the art company “La Machine”, creates a show in the streets of Toulouse. The new show displays giant characters: Asterion, the Minotaur; Lilith, the scorpion woman; and Ariane, the spider woman. Lilith is fond of the Minotaur and wants to take Asterion to hell with her. Ariane protects Asterion and tries everything to keep Asterion safe. The show is displayed over three days and is attended by dozens of people. During the three days, the giant characters appear in the streets of Toulouse. (Photo by Alain Pitton/NurPhoto)

Thai officials inspect counterfeit watches before destroying them at Khlongluang Transportation Station in Pathumtani province, on the outskirts of Bangkok April 9, 2015. The counterfeit goods, which included piles of CDs, DVDs, handbags, clothes, brand name shoes, cell phones, caps, glasses, computers, cosmetics and watches are worth over 3.7 billion Thai baht ($ 115,790,901), according to local authorities. (Photo by Chaiwat Subprasom/Reuters)

These stunning images show the phwoar-some power of some of Americas most extreme weather. Camille Seaman’s wondrous work features huge super cells, crashing lightning and gale-force winds. The roaming photographer has chased storms across the US from Iowa to Wyoming and from Minnesota to Texas. Her favorite places to chase are Kansas, Nebraska and South Dakota – notorious hotspots for spectacular storms. Here: Supercell in Minnesota, near Browerville, Minnesota in 2014. (Photo by Camille Seaman/Caters News)

Inmates are seen at the transgender gallery in La Joya prison on the outskirts of Panama City, Panama February 3, 2016. Inmates of La Joya prison on the outskirts of Panama City are housed in makeshift cells amid heavy overcrowding, living in grimy conditions and with limited medical attention. Many prisoners in the Central American nation languish for years without being sentenced. (Photo by Carlos Jasso/Reuters)

In a north London hospital, scientists are growing noses, ears and blood vessels in the laboratory in a bold attempt to make body parts using stem cells. It is among several labs around the world, including in the U.S., that are working on the futuristic idea of growing custom-made organs in the lab. (Photo by Matt Dunham/AP Photo)

The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide with the formula FeS2. This mineral's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to refer to pyrite found in coal.
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.

In this handout image provided by Ogilvy, a burger made from cultured beef, which has been developed by Professor Mark Post of Maastricht University in the Netherlands (pictured) is shown to the media during a press conference on August 5, 2013 in London, England. The in-vitro burger, cultured from cattle stem cells, the first example of what its creator says could provide an answer to global food shortages and help combat climate change, was fried in a pan and tasted by two volunteers. The burger is the result of years of research by Dutch scientist Mark Post, a vascular biologist at the University of Maastricht, who is working to show how meat grown in petri dishes might one day be a true alternative to meat from livestock.The meat in the burger has been made by knitting together around 20,000 strands of protein that has been cultured from cattle stem cells in Post's lab. (Photo by David Parry)