A pilot study conducted at the University of Missouri showed that the synthetic chemical bisphenol A — or BPA, which is known to mimic estrogen and disrupt hormone levels in animals — can alter a turtle’s reproductive system after exposure in the egg. Turtles are perfect creatures for this type of study, because their sex is determined by the temperature of the environment during their development in the egg.

“Cool dudes or hot babes,” explained Sharon Deem, director of the St. Louis Zoo’s Institute for Conservation Medicine and a lead investigator on the study.

The researchers dropped a liquid form of the chemical onto hundreds of eggs that were incubated at cooler temperatures required to produce male turtles. A few months after they hatched, the turtles’ sex organs were removed and studied. The male turtles had developed gonads that were closer to ovaries than testicles.

The Jamaican iguana is listed as a critically endangered species, but it has been saved from extinction. However, this triumph of the conservation movement is now threatened by the plan to turn the Goat Islands into a $1.5-billion economic zone, transshipment port and logistics hub.

The official name for the project is the Portland Bight Economic Zone and Transshipment Port, and foreign journalists seem to be converts to the campaign against it. The Guardian newspaper in London recently published a portfolio of beautiful photographs of the lizard by the prize-winning photographer Robin Moore.

But it is not just the lizard that is threatened. The livelihood and way of life of fishing communities in and around the Goat Islands would disappear. And the flattening of the Goat Islands, as well as the dredging involved, would threaten 50 species of plant life found only in Jamaica, including 17 that are endangered.

LSTM's Dr Nicholas Casewell, first author and NERC Research Fellow, said: "Our work shows that venom variation observed between related snake species is the result of a complex interaction between a variety of genetic and postgenomic factors acting on toxin genes. This can involve different genes housed in the genome being turned on or off in different snakes at different stages of venom toxin production. Ultimately, the resulting venom variation results in significant differences in venom-induced pathology and lethality and can undermine the efficacy of antivenom therapies used to treat human snakebite victims."

It's a specialized culvert built in Germany, which has small holes at roadway level to allow sunlight to get into the tunnel.

The location was picked after the MN Herpetological Society documented a large number of turtle crossings which were deemed hazardous to both turtles and motorists, who were stopping on the two-lane highway to avoid hitting them.

The $50,000 price is paid for with a $10,000 grant from the University of Minnesota, a $37,000 grant from the DNR's Legacy funding, and $3,000 from the Herpetological Society.

What happens when you throw bones to a group of American alligators? This isn’t a question for late night horror movies, but for science.

Standing behind a safety barrier at Florida’s St. Augustine Alligator Farm, University of Tennessee paleontologist Stephanie Drumheller tossed skeletonized cow legs to a crush of curious alligators. Over and over again, the armored archosaurs rushed in to snap at the morsels, and with every bite they left the predatory hallmarks in the form of punctures and scrapes. These traces were what Drumheller was after. Through understanding the damage modern alligators leave on bones, Drumheller and other paleontologists can follow the depredations of alligators and their croc cousins through time.

The existing dead sample was assumed to be a labelling error and the snake was largely struck from taxonomic registries.

But Daniel Mulcahy, a researcher for the National Museum of Natural History in Washington, suspected it might still exist. He and Juan Martinez Gomez of Mexico's Ecology Institute set out to find it.

Martinez Gomez, an expert on the Revillagigedo Islands, noted the islands change a lot from season to season, so they timed the expedition last May to replicate Beebe's steps as they looked for the snake, which blends in with the island's rock formations and is largely active at night. And they used Beebe's original field notes as a guide.

"Basically, following those directions, we essentially put ourselves in his place," Martinez Gomez said.

One of his graduate students, Juan Alberto Cervantes, was the first to spot one of the snakes for the first time since 1936.

The researchers performed DNA analysis to establish the long, dark spotted snake as its own species and see where it had come from.

As beachgoers watched in awe at Langdon Beach on Gulf Islands National Seashore, two Gulfarium specialists carefully removed Tinkerbell, a 20-pound green sea turtle, and Wendy, a 14-inch Kemp's ridley, from large plastic containers and carried them to an inviting, calm and azure Gulf.

The turtles flapped their flippers furiously in anticipation of freedom as Rachel Cain and Samantha Fuentes carried them to the edge of the surf. Then with a splash punctuated by cheers from the crowd of onlookers, the two turtles swam with purpose toward open water, their shadowy shapes darting here and there under the clear sea.

The 14 new species were described last week in the Ceylon Journal of Science, bringing the total number of known dancing frog species in India to 24. All of the tiny frogs, the largest of which measure just 35 millimeters, come from the genus Micrixalus, which can only be found in the Western Ghats.

Unfortunately, none of these tiny frogs may be around much longer. According to the research by University of Delhi biologist S. D. Biju and colleagues, Micrixalus frogs already suffer from a 100 to 1 male-to-female sex ratio. (That’s another reason for the “dancing”—the males also kick away potential mating competitors.) The frogs only breed after monsoon season when water in their habitats is moving swiftly. On top of that, the Western Ghats are expected to experience much lower rainfall levels in the coming years due to climate change. In fact, the rivers already appear to be drying up and the number of frogs observed in the wild has dropped by 80 percent since 2006, the researchers report.

(S)cientists discovered that glass-frog eggs hatched about 21 percent earlier on average when the fathers were removed. They hatched up to about 34 percent earlier when conditions were drier, suggesting that dehydration was the cue the eggs relied on to hatch early.

"Embryos can cope with delinquent dads," Delia said.

The researchers suggest this kind of embryo behavior may be common among species that provide care to eggs, such as insects, bony fishes and amphibians. "Variation in parental care seems to be the norm rather than the exception," Delia said.

One poisonous bite from the Golden Lancehead pit viper is enough to kill a grown man within a few hours. It’s fast-acting venom will burn through flesh and cause its victim to bleed to death.

Rogerio Zacariotti, a researcher with the Cruzeiro Do Sul University in Brazil, travels to “Snake Island” regularly to monitor the Gloden Lancehead population. He is convinced poachers are stealing the snakes from the island and selling them on the black market.

Zacariotti allowed "Nightline Prime" to accompany him and his team on one of his research trips to "Snake Island," where ABC’s Dan Harris had some too-close encounters with the deadly snakes.

The picture, submitted to a news station’s Facebook page in Austin, shows a rattlesnake coiled among bluebonnets.

The picture has many reconsidering their annual trip to take pictures in the bluebonnets, believing it may be too dangerous.

Some experts, however, are questioning the validity of the picture.

"It’s a real picture,” said Blaine Easton, a snake expert with the South Texas Herpetology Society. “I'm not sure that snake is alive. I think the snake is dead and mounted by a taxidermist."

According to Easton, it is the snake’s neck position that causes him to question the picture. Easton said it did raise a valid concern.

"I have found in the middle of bluebonnets, on some ranches, rattlesnakes sitting there,” said Easton.

After all, Texas is home to 113 species of snakes. The moral, according to experts, is to just be cautious.

Muskegon firefighter Scott Hemmelsbach told The Muskegon Chronicle that he reluctantly agreed to enter the two-story, smoke-filled house Sunday night to retrieve the snake. He says he cradled the "weighty" snake before carrying it to safety.

"It was trying to crawl up the side of his terrarium and get out," Hemmelsbach said. "His face was pushed up on the screen and trying to get out. There was a lot of smoke and he was trapped."

The firefighter said he learned how to handle snakes while he was at Grand Haven High School, where he helped showcase them.

The 1.5-inch-long (4-centimeter-long) frog "is rather strange-looking—it’s quite fat with short legs and bright orange spots on its sides," said Luis German Naranjo, WWF Colombia‘s conservation director.

Naranjo and a team of scientists were surveying wildlife in eastern Colombia’s Orinoco savanna, including animals found on a small farm.

Expecting to find little more than livestock, the team was surprised when the farmer’s seven-year-old son, whose name was given only as Camilito, called the group over to a pool. There, in the water, was the small spotted frog.

The team’s herpetologist, Daniel Cuentas, had never seen anything like it, and immediately set out looking for other examples.

Daniel Goldman spends his days working with venomous rattlesnakes, baby sea turtles, and a dozen other types of animals. But he isn’t a zookeeper, or even a biologist. He’s a physicist, studying locomotion at Georgia Tech. In order to test his hypotheses, he builds robots that mimic the ways animals move. Jealous yet?

Popular Science: Why do you have so many sandboxes?

Daniel Goldman: No one has ever studied the complexities of a sidewinder rattlesnake’s movement on sand, its natural substrate. In principle, you can understand how a hummingbird stays aloft or how a shark swims by solving fluid-dynamics equations. We don’t yet have fundamental equations for complex terrain—sand, leaf litter, tree bark. To figure that out, we built giant sandboxes that are equipped with high-speed cameras and can tilt to mimic dunes.

PS: Which animals are the hardest ones to work with?

DG: The rattlesnakes were a lucky break. You put them in a sandbox, and they just start sidewinding—the sideways slithering they do to cross sand. But most animals don’t do what you want. Ghost crabs, for example, are ridiculously fast. In the laboratory, you can get about 10 good trials out of them: They’ll run away from you down a track, where high-speed cameras record them. After that, they seem to decide they are no longer afraid and start trying to pinch you.

"In the Oligocene epoch, from about 34 to 23 million years ago, we would have expected to see a fauna dominated by booid snakes, such as boas and pythons. These are generally 'sit and wait' constricting predators that hide and ambush passing prey," lead author Jacob McCartney, a postdoctoral researcher in the Ohio University Heritage College of Osteopathic Medicine, said in a news release.

The newly discovered species is named 'Rukwabyoka holmani' and was unearthed in the Rukwa Rift Basin of Tanzania. The species genus name comes from the Rukawa region with the Swahili word for snake. And the species name honors J.Alan Holman, a palaeontologist. The team found eight different types of fossil snakes varying in length from 2.6 mm to 5 mm.

Lillywhite started studying this species in 2009, at a site off the coast of Costa Rica. “We’ve looked at hundreds,” he says. “No sea snake we’ve observed has drunk any seawater.”

They only stick to the fresh stuff, but the amount they drink varies throughout the year. These snakes live in a place that goes through drought from November to May. If they were captured during these dry spells, they betrayed their thirst by sipping heavily from fresh water; if they were caught in wetter months, they barely drank. “If the snake drinks fresh water, it’s thirsty,” says Lillywhite. “If it’s thirsty, it’s dehydrated, and if it’s dehydrated, it’s not doing what the textbooks said.”

The team also found that the snakes had significantly less water in their bodies than in the dry months than in the wet ones. Despite having a salt gland and being surrounded in water, the snakes are thirsty and dehydrated for months on end. Lillywhite thinks that they cope by having an unusually high amount of water in their bodies to begin with. They might also have adaptations that help them to lose water slowly, and to withstand the effects of dehydration.

In the wild, it is possible that the snakes use deep springs or estuaries, but they are incredibly widespread and Lillywhite has never found any evidence of them congregating in specific sites.

Instead, rain brings them salvation.

...Megalania ain’t what it used to be. For one thing, the lizard’s bones are so similar to those of other monitor species – belonging to the genus Varanus – that paleontologists have taken to calling it Varanus priscus. And while it seems likely that the big lizard was venomous, recent size estimates have shrunk this “dragon in the dust.”

Let’s have a look at the traditional baseline first. In 2004, working with the relationship between vertebrae size and body length, paleontologist Ralph Molnar proposed that mature Varanus priscus could have been between 23 and 26 feet long, depending on the anatomy of the tail. But other researchers think such sizes are major overestimates. In a 2002 study that critiqued “the myth of reptilian domination” in prehistoric Australia, anatomist Stephen Wroe reanalyzed old body size data and calculated that the lizard probably averaged about 11 feet in total length and, citing earlier estimates from Molnar, wouldn’t have grown much longer than 15 feet.

Size estimates in a 2012 paper by paleontologist Jack Conrad and colleagues came out in between the extremes. While describing a new, large Varanus species that once lived in Greece, the researchers also took a look back at Australia’s ever-contentious lizard. Without the tail, the Varanus priscus specimen in their study had an estimated body length of almost seven feet, meaning that this individuals total length was almost certainly longer than the 11 foot average Wroe suggested. Especially large specimens, Conrad and coauthors noted, could have had bodies almost 10 feet long with the tails trailing behind, although these animals still would have been smaller than the monstrous lizards paleontologists used to reconstruct.

The turtles didn’t know it, but their lives were in the hands of the sandal-wearing vet who has worked for 42 years on animals’ eyes — including those of Lolita the killer whale and thoroughbred Seattle Slew before he won the Triple Crown.

Bette Zirkelbach, manager of the nonprofit Turtle Hospital in the Middle Keys' island town of Marathon, had contacted Karpinski a few months earlier “in desperation” to find a new treatment to help Hook and Jack avoid euthanization. As in the case of many turtles with the same condition, their eye tumors grew back about six weeks after being removed, a process that kept repeating itself.

"We can’t release turtles back into the wild if they don’t have vision in at least one eye," Zirkelbach said.

Karpinski came up with the idea of trying Fluorouracil, an anti-cancer medication used in humans. Karpinski already had found success using it on horses with skin cancer and on a Malayan tapir at Zoo Miami with eye tumors. Maybe, she thought, it would work on the endangered sea creatures.

"Dr. Karpinski got creative," Zirkelbach said. "And honestly, the turtles had nothing to lose."

The Whitley Wildlife Conservation Trust, which runs Paignton Zoo, Living Coasts in Torquay and Newquay Zoo in Cornwall, helped fund the fieldwork with rare amphibians in the mountains of Eastern Tanzania.

It has led to the discovery of two Kihanga reed frogs, a male and female, by Elena Tonelli, a PhD student at Manchester Metropolitan University whose work is part-funded by the trust.

The frogs are officially endangered and the two photographed by Ms Tonelli were recorded in the northern part of the Uzungwa Scarp Forest Reserve, some distance from their only previously known site - a small swamp in the centre of the reserve.

The student has since also found the species, which hadn’t been seen at all for a decade, at the original site.

Researchers discovered the dinosaur's remains in 2006 in the Prince Creek Formation on Alaska's North Slope. At the same quarry, Fiorillo and Tykoski have previously uncovered other important finds, such as remnants of the horned dinosaur species Pachyrhinosaurs perotorum, whose discovery was announced in 2011.

"I find it absolutely thrilling that there is another new dinosaur found in the polar region," Fiorillo said in a statement from the Perot Museum. "It tells us that the ecosystem of ancient Arctic was a very different place, and it challenges everything we know about dinosaurs."

[...]

A Tyrannosaurus rex would have weighed between 7 and 8 tons, with a length of about 40 feet. By comparison, an adult Nanuqsaurus might have been only 25 feet long, with a weight of 1,000 pounds. The head was probably about 2 feet long, CNN affiliate WFAA reported.

"There were features in these specimens that were unique; you didn't see them in other tyrannosaurs," Tykoski told WFAA.

Two of the six species of tinker frog have already been wiped out, and researchers believe the lethal amphibian Chytrid fungus is to blame.

The one- to two-centimetre-long frog, which is native only to Queensland rainforests, gets its name from its unique call, according to Professor Jean-Marc Hero from Griffith University.

"The thing that really makes them stand out is their tinker, the sound they make is like the tinker of a glass jar with a metal pen or something," he said.

Professor Hero says a new program on the Gold Coast has managed to breed the tinker frog for the first time.

"There are only six species - they are an ancient Gondwana group - and at least three of those are already gone," he said.

"We are looking to recover and support the species that are remaining."

Andre Ngo, director of research and curriculum at Reptilia, a Vaughan-based reptile zoo, gave an informative presentation to almost 25 police, firefighters and bylaw officers in Stayner Friday afternoon.

“It was an excellent training opportunity for us,” Clearview fire chief Colin Shewell said. “We got some real insight in terms of what to do when we encounter a reptile or are dealing with someone harmed by one.”

Huronia West OPP officers, Clearview firefighters, representatives from Clearview bylaw and firefighters from Springwater, Adjala-Tosorontio, Mulmur/Melancthon, Blue Mountains and Oro-Medonte attended the training session, held at the Joint Emergency Services Facility on Highway 26.

“My goal with you is to teach you how to secure a scene and stay safe,” Ngo said.

He started off by reviewing the major groups of reptiles and identified commonly encountered species. He also talked about safe handling practices.