'Sharkansas' contains entire fossilized skeletons dating back 320 million years. Breakthroughs, discoveries, and DIY tips sent six days a week. Arkansas is hundreds of miles from the Gulf of Mexico, but it's home to countless sharks . A trove of the fossilized predator's remains are embedded within the Fayetteville Shale --a roughly 350-million-year-old geological formation in the state's northwestern corner. Because a shark's cartilage skeleton decomposes so quickly, they usually only leave teeth behind when they die.

Environment Animals Wildlife Sharks Megalodon could become Maryland's official state shark The 66,000-pound prehistoric predator once stalked the Bay State's waters. Breakthroughs, discoveries, and DIY tips sent six days a week. In a state better known for its delicious seafood and as the home of the United States Navy, there's a new effort to create the country's first state shark. Earlier this month, Maryland State Senator Jack Bailey and House Delegate Todd Morgan filed SB135 to designate the megalodon () as the official state shark. While the mighty megalodon is not swimming along the shores of the Bay State now, the enormous prehistoric shark relative once dominated the shallow seas that covered Maryland and the rest of the Atlantic coastal plain .

Environment Animals Wildlife Fish'Walking sharks' lay eggs without breaking a sweat Breakthroughs, discoveries, and DIY tips sent six days a week. Being pregnant and giving birth is hard work for any species--but epaulette sharks () might disagree. These fish and a number of other species are known as " walking sharks " for their ability to traverse both the seafloor and land with their fins. Epaulette sharks' energy use didn't change during their reproduction cycle, as described in a study recently published in the journal . "Reproduction is the ultimate investment you are literally building new life from scratch," Jodie Rummer, a marine biologist at James Cook University and co-author of the recent study, said in a university statement .

Science Biology Evolution Cleveland's beloved ancient sea monster was more turtle than shark Paleontologists revised the anatomy of Dunkleosteus terrelli-and it's still terrifying. Breakthroughs, discoveries, and DIY tips sent every weekday. About 360 million years ago, present-day Cleveland was home to a fearsome predator . But this giant did not stalk prey on land. Covered in armor plates and featuring scalpel-sharp, bone blades for teeth, was an undisputed, ancient apex predator.

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Moctezuma's pod continues their dominance in the Gulf of California. Breakthroughs, discoveries, and DIY tips sent every weekday. Orca whales are skilled pack hunters with an ever-growing list of prey . Recently, ocean researchers discovered that the apex predators aren't afraid of taking on equally formidable foes-- great white sharks . Now, a study published on November 3 in the journal documented even more remarkable hunting behavior.

Gear Home Shark's pet-friendly air purifier is cheaper than ever at Amazon for a limited time The most popular Shark air purifiers are on sale for their lowest prices of the year at Amazon. The deals also include vacuums, styling products, and more. We may earn revenue from the products available on this page and participate in affiliate programs. Have you turned your home's heat on for the winter yet? I finally gave in and switched my thermostat over to heat only to find myself smelling the familiar dusty scent emanating through my vents.

"The males lost all their energy and lay immobile on the bottom while the female swam away actively." Breakthroughs, discoveries, and DIY tips sent every weekday. Marine biologists recently documented a promising (if intimate) marine moment in the ocean waters near northeast Australia. For the first time, researchers recorded a leopard shark () mating event. But the footage doesn't showcase a pair of the endangered predators going at it--the brief tryst involved three participants.

A college seafood forensics class investigated some fishy labelling. Breakthroughs, discoveries, and DIY tips sent every weekday. Sharks have been swimming in Earth's seas over 450 million years, but some struggling shark species may be ending up on grocery store shelves, in fish markets, and even sold online. Meat from shark species at risk of extinction is still available for sale in the United States, despite lawmaker's best efforts. "We found critically endangered sharks, including great hammerhead and scalloped hammerhead, being sold in grocery stores, seafood markets, and online," said Dr. Savannah J. Ryburn, a marine ecologist at University of North Carolina at Chapel Hill and co-author of a small study recently published in "Of the 29 samples, 93 percent were ambiguously labeled as'shark,' and one of the two products labeled at the species level was mislabeled." In the new study, a seafood forensic class at UNC bought 30 different shark products-19 raw steaks and 11 packages of shark jerky.