The human parathyroid gland, which regulates the level of calcium in the blood, probably evolved from the gills of fish, according to researchers from King's College London. Professor Anthony Graham and Dr Masataka Okabe suggest that the gills of ancestral marine creatures, which were used to regulate calcium levels, were internalised rather than lost when land-living, four-limbed animals the tetrapods evolved.
Guesser: Professor Anthony Graham and Dr Masataka Okabe, King's College London
How VENUS got her teeth
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Until now it has not been clear which plant the Venus flytrap and
waterwheel evolved from. Waller and his colleague Thomas Gibson now think
they have the...
4 years ago
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