Scientists have found that differences in levels of emotional contagion between humans and bonobos are attributable to the quality of relationships shared by individuals. Disclaimer: AAAS and ...
Is it true that we yawn when our brains are deprived of oxygen? Most of us can feel a yawn coming on. The muscles in our jaw begin to tighten, our nostrils might flare, and our eyes might tear up ...
Even dolphins, playful and curious though they are, can get bored with life in an aquatic environment and apparently need to yawn to stay awake. Video footage captured a dolphin yawning ...