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Ancient ctenacanth sharks reveal Mississippian seas inside Mammoth Cave
science8 days ago

Ancient ctenacanth sharks reveal Mississippian seas inside Mammoth Cave

Researchers have identified two 325-million-year-old ctenacanth shark fossils in Mammoth Cave, Kentucky—Troglocladodus trimblei and Glikmanius careforum—each about 10–12 ft long. The find sheds light on Mississippian coastal ecosystems and shark evolution, and results were obtained through collaborative fieldwork with MNCPPC, the Cave Research Foundation, and the National Park Service, with the study published in the Journal of Vertebrate Paleontology.

via Earth.com|
#ctenacanth#mammoth-cave#mississippian
Southern Sleeper Shark Captured Off Antarctica, Redrawing Cold-Water Boundaries
conservation10 days ago

Southern Sleeper Shark Captured Off Antarctica, Redrawing Cold-Water Boundaries

Scientists using an undersea camera recorded the first footage of a southern sleeper shark in Antarctic waters near the South Shetland Islands at about 1,600 feet depth and 2°C. The sighting challenges the assumption that Antarctic seas are too cold for sharks and suggests a warm deeper layer may enable occasional southward incursions; climate-change–related warming could drive more sharks toward the region, but data remain sparse, underscoring the need for further study of the Antarctic ecosystem.

via Gizmodo|
#antarctica#climate-change#conservation
Sleeper shark surprises scientists with rare Antarctic camera sighting
science10 days ago

Sleeper shark surprises scientists with rare Antarctic camera sighting

Researchers captured video of a 10–13 ft sleeper shark around 1,600 feet deep off the South Shetland Islands near the Antarctic Peninsula, challenging the belief that sharks don’t inhabit Antarctic waters. The sighting, recorded by a deep-sea camera, suggests sharks may occur farther south than previously documented, though such populations are likely sparse and data-limited due to remoteness and seasonal camera access. Climate change could influence future range shifts in the region.

via CBS News|
#antarctic-waters#antartic-ocean#climate-change
Oilers erase 3-goal deficit to edge Sharks in OT
nhl1 month ago

Oilers erase 3-goal deficit to edge Sharks in OT

Edmonton erased a 3-0 deficit and stunned San Jose 4-3 in overtime, with Zach Hyman scoring 1:06 into OT after Leon Draisaitl had a goal and two assists and Connor McDavid added a goal and an assist. Draisaitl sparked the rally with a 3rd‑period goal, while Evan Bouchard tied it late in regulation. San Jose built the early lead on goals from Michael Misa, Adam Gaudette and Collin Graf; Connor Ingram stopped 17 shots for the Oilers and Yaroslav Askarov made 28 saves for the Sharks.

via CBS Sports|
#comeback#nhl#oilers
Peruvian Fossil Unveils 9-Million-Year-Old Shark, a Relative Of the Great White
science1 month ago

Peruvian Fossil Unveils 9-Million-Year-Old Shark, a Relative Of the Great White

Scientists in Peru's Pisco Basin unearthed a remarkably well-preserved near-complete skeleton of Cosmopolitodus hastalis, an ancient relative of the great white shark. Dated to about 9 million years ago, the specimen includes a full jaw with serrated teeth and even preserved stomach contents—sardines—offering rare insight into late Miocene marine ecosystems and early apex-predator lifestyles.

via The Daily Galaxy|
#fossils#miocene#paleontology
Rainy-season surge puts Sydney beaches in shark spotlight
science1 month ago

Rainy-season surge puts Sydney beaches in shark spotlight

A spate of four shark bites in 48 hours along eastern Australia—three near Sydney and a fatality in Sydney Harbour—has been linked to heavy rains that flushed freshwater into coastal waters, drawing bull sharks and baitfish. Experts say the incidents reflect environmental and reporting factors rather than increased aggression, discourage culls, and stress practical safety measures like avoiding swimming after rain and staying aware of beach warnings.

via BBC|
#australia#beaches#bull-sharks
Ovechkin’s 20th and Hertl’s five-point night punctuate a busy NHL slate
sports1 month ago

Ovechkin’s 20th and Hertl’s five-point night punctuate a busy NHL slate

Alexander Ovechkin notched his 20th goal of the season as Washington earned a win, while Tomas Hertl erupted for a five-point performance to power Vegas past San Jose 7–2. The Jets distributed offense against New Jersey with Iafallo, Toews, Vilardi and Pearson contributing, and Connor Hellebuyck turning in 24 saves; New Jersey leaned on Cody Glass for two goals as the Hughes brothers contributed, amid the ongoing Dougie Hamilton saga and Kovacevic’s late assist. Elsewhere, Boston edged Pittsburgh with Victor Arvidsson scoring the lone goal and Joonas Korpisalo delivering solid netminding, and in Salt Lake City Dmitri Voronkov’s OT winner for Columbus capped a night of notable performances, with Werenski and Marchenko aiding the play; Roman Josi also produced multi-point nights for Nashville.

via DobberHockey|
#hertl#jets#ovechkin
Sharks Discovered Living Inside Active Underwater Volcanoes
science2 months ago

Sharks Discovered Living Inside Active Underwater Volcanoes

Scientists discovered large sharks swimming inside Kavachi, an active underwater volcano in the Solomon Islands, challenging assumptions that such hostile environments cannot support complex life. The sharks appeared unaffected by the hot, acidic waters, raising questions about their adaptations and resilience. Follow-up research using robotic equipment confirmed the extreme conditions, but the survival mechanisms of these sharks remain unknown, offering potential insights into marine adaptation to environmental stress.

via Times of India|
#extreme-environment#kavachi#marine-life