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What You Should Know About Expired WaterWe once laughed at bottled water with expiration dates on it. And, to be honest, we used to laugh at the whole idea of bottled water, before schools removed their water fountains and Flint's water system collapsed. But water doesn't expire, does it? No. What expires is the bottle. A bottle's expiration date is the estimated date at which chemicals leeching from the plastic bottle could affect the taste of the water.However, there is no legal requirement to pull expired water from store shelves. The chemicals that affect taste are not in high enough concentrations as to be dangerous. But that's only true if the water bottles have been stored properly. Heat, light, and other factors can cause problems in bottled water over time. Learn the factors that might make your bottled water unsafe and what to do about them at ScienceAlert. -via Real Clear Science(Image credit: US Navy) 

This Planet Is The Only One That Has Plate TectonicsSpoiler alert: it’s Earth.Plate tectonics refers to the movement of the plates in our planet’s lithosphere. These are fragmented pieces of the crust and upper mantle. They collide, spread apart, uplift, and subduct, creating the lands and bodies of water we see today and other diverse surface features. This phenomenon affects our planet. These plates can form mountains, volcanic island chains, and resize oceans. They can also slowly break continents apart. This feature can only be found on Earth. While scientists don’t have the full scope of the universe beyond us, the other celestial bodies in our solar system do not possess plate tectonics. These experts hypothesize that our planet's internal heat and vast water allow Earth’s plates to flow and slide around. Read more about our planet’s plate tectonics here. Image credit: A. El-Aziz Khairy Ebd el-aal, Egyptian National Seismological Network, 2011

How Much Pain Will You Get After Falling Into The World’s Most Dangerous Plant?A lot. One woman shared that it was worse than giving birth to a child.Naomi Lewis was biking in North Queensland in Australia when she came off her vehicle. While she was lucky that she landed on something soft to cushion her landing, it was unfortunate that it was the Gympie-Gympie plant. The flora, also known as the 'giant Australian stinging tree,' is a member of the nettle family. It can grow in rainforests in Australia and Malaysia. The plant can inject venom into anyone who falls on it. An unfortunate soul can experience extreme pain that can stay for a lot of months, as Lewis experienced. The sensation of pain is described as 'being burnt with hot acid and electrocuted at the same time’.She spent six months in physical torture, even after her husband rushed her to a pharmacy to obtain some medicine and hair removal strips to remove the stinging hairs embedded in her skin when she fell. “The pain was just beyond unbearable. The body gets to a pain threshold and then I started vomiting. I’ve had four kids – three caesareans and one natural. Childbirth, none of them even come close,” she told ABC News.Image credit: Naomi Lewis

Two High Schoolers Claimed They Have Proven The Pythagorean Theorem This was thought to be an impossible feat. Two young students from New Orleans claimed to have proven the Pythagorean Theorem, something that has stumped experts for 2,000 years. These high schoolers, Calcea Johnson and Ne'Kiya Jackson, were able to present their findings to researchers and talk about their work with local TV.The theorem was difficult to prove because it underpins trigonometry. You can’t exactly use it if you don’t accept that these ideas are correct. The teenagers state that the claim written in the book The Pythagorean Proposition, which said that there are no proofs for the theorem as they are based upon the truth isn’t quite true. Johnson and Jackson proved the theorem using the Law of Sines. Their claim has not been confirmed by other experts in the field yet. However, they are encouraged to publish their findings in a journal where they can undergo the academic peer-review process.Image via wikimedia commons

New 13-Sided Shape Discovered By Mathematicians Meet the one shape that can cover all. Just kidding, it’s still a new discovery, regardless.Einstein is a 13-sided shape discovered by computer scientists that is capable of covering a plane without repeating a pattern. In the field of mathematics, this is called an  "aperiodic monotile," a figure that can tile a plane but never repeat. Craig Kaplan, computer science from the University of Waterloo and one of the paper's four authors shared that this is the first true monotile. "We prove that this shape, a polykite that we call 'the hat,' must assemble into tilings based on a substitution system," he wrote. Kaplan and his associates were looking for a one-in-a-million thing. One of his co-authors, Chaim Goodman-Strauss, shared that you start by exploring around 999,999 possibilities.  "You filter out the 999,999 of the boring ones, then you've got something that's weird, and then that's worth further exploration. And then by hand you start examining them, try to understand them, and start to pull out the structure," he told New Scientist.Image credit: Craig S. Kaplan/Twitter

Thylacosmilus had Weird Eyes, TooThylacosmilus atrox sounds like a cross between a smilodon and a thylacine. Those two are not at all related, but Thylacosmilus was a South American marsupial with saber teeth. It also had an extreme L-shaped lower jaw. But this weird carnivorous animal's eyes are very strange as well.Most predators have eyes that face the front of the head, for enhanced depth perception, while prey animals have eyes to the side of the skull for defensive panoramic vision. Thylacosmilus atrox had eyes on the sides of its skull like a cow, despite being a predator. A new study explains that the reason for this is those huge teeth. Thylacosmilus' teeth grew over the front of the skull for strength, which pushed the eyes to the side. However, Thylacosmilusmade up for this by getting those orbital bones to protrude from the skull, giving it at least a bit of depth perception for hunting. Thylacosmilus died out about three million years ago. (Image credit: © Jorge Blanco) 