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This is Scientific American's 60-second science.

I'm Christopher in Taliatta.

Long before dolphins swam the seas, their near-lookalike ikhthosaurs inhabited the Earth's oceans.

Now scientists say those ancient seafaring reptiles may have had more in common with modern-day sea turtles and marine mammals than we knew.

Over time, a dead animal's bones can be slowly replaced

by minerals, leaving behind a rocky fossil. The researchers demineralize the 180 million-year-old

fossil of an ectheosaur, and it left behind soft, flexible tissues. Which is kind of amazing.

Yohan Lindegrain, a paleontologist at Lund University in Sweden.

It turns out that the skin is still there with cells and cellular organelles

and even traces of the original biomolecular makeup.

Those remains revealed that the Icthiosaurus sported camouflage,

appropriate for its underwater environment.

Light on the bottom, darker on top,

just like many marine animals have today. The researchers also found a black, glossy substance

that was harder to identify, so they collected dead sea turtles and porpoises and mimicked

fossilization by heating and squashing the creature's skin, which led them to realize

...