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The common bottlenose dolphin is one of the most well-studied marine mammals in the world. Yet in the last few decades, ...
08/03/2023

The common bottlenose dolphin is one of the most well-studied marine mammals in the world. Yet in the last few decades, genetic research has revealed scientists aren't looking at a single species after all, but various lineages still very much in the process of evolving.

Researchers at the University of Miami have split what was historically thought to be one dolphin species (Tursiops truncatus) in the Pacific Ocean into a few distinct subtypes.

In the offshore waters of the Eastern Tropical Pacific (ETP), between Baja California and the Galapagos, bottlenose dolphins show distinctly smaller skulls and bodies than those off the coast of southern California or Japan.

After discovering a host of bizarre creatures of the deep near Cocos (Keeling) Islands, Australia's national science age...
04/03/2023

After discovering a host of bizarre creatures of the deep near Cocos (Keeling) Islands, Australia's national science agency CSIRO has found something quite surprising in the depths of the watery abyss: a shark graveyard, full of fossilized teeth, some millions of years old

Initially, researchers thought they'd pulled up a net full of disappointing sediment and manganese nodules. Until they had a closer look.

"It was amazing, it really was," Museums Victoria Research Institute collections officer Dianne Bray tells the Australian Broadcasting Corporation (ABC).

"Not all were fossils, some were relatively recent mako sharks and two species of great white shark relatives."

The presence of a mane is important because it could tell us about the social structures of cave lions. For example, whe...
02/03/2023

The presence of a mane is important because it could tell us about the social structures of cave lions. For example, whether they live by themselves or in groups with clear hierarchies.

At the moment, scientists are still debating whether cave lions during the Ice Age roamed the steppes of Siberia on their own or in a pride like modern African lions.

There's one particular painting in France's Chauvet cave from the Ice Age that depicts nearly a dozen cave lions, both male and female, in the act of hunting bison.

"Hunting in groups can be more effective than solitary hunting when the prey is large, and cave lions would have had many such prey species available in their ecosystem, for example, mammoths and rhinoceros, when there were no other options available to them," the researchers wrote in a study published in 2021, describing the find.

In fact, early human artwork from the time suggests cave lions rarely sported manes, or if they did, they were extremely...
02/03/2023

In fact, early human artwork from the time suggests cave lions rarely sported manes, or if they did, they were extremely discrete. Some Ice Age paintings, for instance, show dark patterns of coloring on the cave lion's face, but it's unclear what that represents.

Boris and Sparta are both juvenile cave lions, which means it's hard to say how their coats would have developed as they aged. Apart from some dark coloring on the backs of their ears, researchers say they are mostly covered in yellowish-brown fur.

If the cubs had had a chance to grow up, experts think their fur would probably have turned more of a light gray to help them camouflage in the cold Siberian Arctic.

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