A recent study found that people who fear spiders often perceive the arachnids as being bigger than they really are. Researchers say their findings may help treat certain phobias.
As rhinos evolved and grew bigger they became more susceptible to bone diseases, including degradation, inflammation and infection.
A recent study of carnivorous animals foiund that those with large brains (relative to their body size) are better at solving problems than smaller-bodied individuals. Of the 140 animals tested, bears were the most successful at retrieving their favorite snacks from inside a secured metal box.
Even tiny birds can live in the Arctic, and very large animals can live near the equator, despite earlier thoughts about which sizes of animals could adjust to cold or heat.
A recent study found that the extent to which animals tolerate humans is largely driven by the environment in which they live and their body size.
Small fish dominated oceans following a mass extinction 359 million years ago. This suggests small fish actually have an evolutionary advantage over larger marine predators.
Dinosaurs had an elaborate nasal passage to keep their unusually large bodies cool, protecting their brain from overheating.
A study on a breed of farmbirds known as Plymouth Rock chickens suggests evolutionary differences can be observed on a much shorter time scale than previously thought.
Our genus comes in all different shapes and sizes, from short and fat to tall and skinny. And new research suggests that the diversity in human body size that we see today emerged earlier than scientists previously thought.
Marine animals just keep getting bigger and bigger, and it's not because they are eating their Wheaties. New research finds that over time evolution favors ever-increasing body size - and not by chance.