Tag: biology
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Evolution. Dark DNA.
Scientists long assumed that new genes appear when evolution tinkers with old ones. There are studies suggesting that genes do not always evolve from existing ones, as biologists long supposed. Instead, some are fashioned from desolate stretches of the genome that do not code for any functional molecules. For example in the fish genomes, there…
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Why doesn’t any animal have three legs?
If 'Why?' is the first question in science, 'Why not?' must be a close second. Sometimes it's worth thinking about why something does not exist. Such as a truly three-legged animal. At least one researcher has been pondering the non-existence of tripeds. "Almost all animals are bilateral," he said. The code for having two sides…
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Touching the untouched.
Jellyfish are about 95% water, which makes them very difficult to study because most of the underwater tools available to marine biologists are clunky, heavy, and often shred jellyfish and other delicate creatures to pieces. A new ultra-soft gripper uses fettuccini-like 'fingers' inflated with water to gently grasp jellyfish and release them without harm, allowing…
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Listening to music. Humans. Apes.
In the eternal search for understanding what makes us human, scientists found that our brains are more sensitive to pitch, the harmonic sounds we hear when listening to music, than our evolutionary relative the macaque monkey. The study, funded in part by the National Institutes of Health, highlights the promise of Sound Health, a joint…
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The evolution of… evolution.
New research identifies a previously overlooked global event which changed the course of the evolution of life in the oceans. It coincided with a rise in calcium carbonate-secreting plankton and their subsequent deposition on the ocean floor. The ocean as we understand it today was shaped by a global evolutionary regime shift around 170 million…
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