Health

Humans don't hibernate, but we still need more winter sleep

Whether we're night owls or morning larks, our body clocks are set by the sun. Theoretically, changing day length and light exposure over the course of the year could affect the duration and quality of our sleep. But figuring ...

Medical research

Immune cell betrayal explains why it gets colder as we age

Human evolution has provided us a level of protection from the existential threat of cold temperature with the capacity to produce heat from fat stored in the body. However, with age, people become more susceptible to cold ...

Psychology & Psychiatry

Happiness and the evolution of brain size

During human evolution, the size of the brain increased, especially in a particular part called the neocortex. The neocortex enables us to speak, dream and think. In search of the causes underlying neocortex expansion, researchers ...

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