New findings clarify thyroid's role in mammalian seasonal changes

Researchers now have a better understanding of the role that thyroid hormones, the tissues that produce them, and the biochemical pathways on which they act have in driving seasonal reproduction in some mammals, and how this ...

What roundworms can teach us about human growth

Human beings and the roundworm C. elegans have more in common than you'd expect. Thanks to a common ancestor more than 700 million years ago humans and roundworms have a similar hormone to drive and regulate growth. By activating ...

Why the flounder is flat

Flatfish are some of the most unusual vertebrate animals on our planet. They start out their life fully symmetrical, like any other fish, but undergo a spectacular metamorphosis where the symmetric larva is transformed into ...

How mixing light with salt makes a smolt?

For decades, researchers have tried to find out what regulates changes in salmon when they transform from being freshwater to saltwater fish. Now they have come a little closer to an answer.

Contaminants also a threat to polar bears

The polar bear (Ursus maritimus), one of the largest carnivorous mammals on Earth, is vulnerable to a series of dangers. An international team has established a guide to evaluate the condition of its health, and although ...

Zebrafish stripped of stripes

Within weeks of publishing surprising new insights about how zebrafish get their stripes, the same University of Washington group is now able to explain how to "erase" them.

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