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lunduniversity.lu.se
W7QM9
TIL Birds have mitochondria in their red blood cells, and during winter months there is more mitochondria and said mitochondria produce more heat. In at least some species this helps warm them up during that time of year.
JYeMV
TIL that most indigenous communities who paint their bodies live in areas where there is an abundance of bloodsucking horseflies, mosquitoes, or tsetse flies - and a 2019 study showed that white, painted stripes on the body protect skin from insect bites, hence protecting them from airborne diseases
5YDG9
TIL six-month old infants recognize when adults imitate them, and perceive imitators as more friendly. The babies looked and smiled longer at an adult who imitated them, as opposed to when the adult responded in other ways and approached them on their own.