The weight problem that land animals cannot escape A blue whale's heart alone weighs around 180 kilograms, roughly the mass ...

A University of Montpellier study published on September 1st in the Proceedings of the National Academy of Sciences reported that human intervention over the last millennium drove a sharp divergence ...

The mystery behind why Alaskan horses, cryptodiran turtles and island lizards shrunk over time may have been solved in a new study. The new theoretical research proposes that animal size over time ...

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The largest animals do not have proportionally bigger brains -- with humans bucking this trend -- a new study has revealed. The largest animals do not have proportionally bigger brains -- with humans ...

Sexual dimorphism, the systematic difference in form between males and females, is a pervasive feature of animal biology. One of its most studied manifestations is sexual size dimorphism (SSD), in ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The evolution of some of the earliest complex animals on our planet may ...

Small really does seem to be beautiful in evolutionary terms. The largest dinosaurs, pterosaurs and mammals may look impressive but these giants are vastly outnumbered by microscopic bacteria and ...

One of the biggest quests in biology is understanding how every cell in an animal's body carries an identical genome yet still gives rise to a kaleidoscope of different cell types and tissues. A ...