Polar bears have black skin -  Polar bears have black skin beneath their fur which helps them to absorb more sunlight in cold .

Butterflies taste with their feet - butterflies have taste sensors on their feet which help them to find food .

Octopuses 🐙 have three hearts - octopuses 🐙 have three hearts . Out of that , 2 hearts are used to pump blood to their gills and 1 for pumping blood to the body .

Rats laugh when they are tickled - Rats 🐀 laugh when they are tickled . They make a chirping sound similar to humans .

Giraffes 🦒 have purple tongues - Giraffes 🦒 have purple long tongue that can reach upto 53 cm . This coloured tongues help them to protect their tongues from sunburn .