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2023年2月28日Cartilaginous fish have changed much more in the course of their evolutionary history than previously believed. Evidence for this thesis has been provided by new fossils of a ray-like shark, ...
May 12, 2022 —From embryo to turtle cracker: Palaeobiologists studied the multiple changes in tooth shape in the tiger shark. The study is also central in drawing conclusions about extinct species from the myriad ...
Jan. 14, 2021 —A team led by Sebastian Stumpf from the University of Vienna describes an well-preserved skeleton of the ancient shark Asteracanthus. This rare fossil find comes from the famous Solnhofen limestones ...
Mar. 18, 2021 —The fossil of an unusual shark specimen reminiscent of manta rays sheds light on morphological diversity in Cretaceous sharks. This plankton feeder was discovered in Mexico and analysed by an ...
Nov. 21, 2022 —For sharks living in the open ocean, longline fishing is the number-one threat, with an estimated 20 million pelagic sharks caught annually by fishers looking for tuna and other desired ...
Nov. 18, 2020 —Some, if not all, early sharks that lived 300 to 400 million years ago not only dropped their lower jaws downward but rotated them outwards when opening their mouths. This enabled them to make the ...
Jan. 21, 2022 —In a win-win for commercial fisheries and marine wildlife, researchers have found that using lighted nets greatly reduced accidental bycatch of sharks, rays, sea turtles, and unwanted ...
Jan. 12, 2021 —As climate change causes the world's oceans to warm, baby sharks are born smaller, exhausted, undernourished and into environments that are already difficult for them to survive ...
Mar. 15, 2022 —The first physiological evidence that sharks take a break from tracking prey to catch a few winks has been uncovered by a researcher who specializes in sleep among aquatic creatures, from sharks to ...
Sep. 7, 2020 —Sharks' non-bony skeletons were thought to be the template before bony internal skeletons evolved, but a new fossil discovery suggests ...