One in 18 people have a third nipple. Known as polythelia, the third nipple is caused by a mutation in inactive genes.

What a sad little life

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣶⣶⣤⣄⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣰⣿⣇⣀⣼⣿⡷⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣾⣿⣿⣿⣿⡿⠋⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣠⣶⣾⣿⣿⣿⡿⠛⠻⡇⠀⠀⠀⠀
⠀⠀⢀⣠⣤⣤⣤⣤⣴⣶⣿⣿⣿⣿⣿⡿⢿⣿⠀⠀⠀⠀⠀⠀⠀⠀
⠀⣾⣿⠿⠿⠿⢿⣿⣿⣿⣿⣿⣿⣿⡏⠀⠀⠈⠀⠀⠀⢰⣦⣤⣾⠇
⢸⣿⣯⡀⠰⣦⣄⣽⣿⣿⡿⠋⠀⠙⠃⠀⠀⣄⠀⢀⣠⣾⣿⣿⡿⠀
⠀⢻⣿⣿⣶⣾⣿⣿⡿⠛⠇⢀⡀⠀⠀⢀⣠⣿⣿⣿⣿⣿⣿⠟⠀⠀
⠀⣾⣿⣿⣿⣿⣿⣯⣤⣤⣤⣼⣿⣶⣿⣿⣿⣿⣿⣿⠿⠋⠁⠀⠀⠀
⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠟⠋⠁⠀⠀⠀⠀⠀⠀⠀
⠘⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⠋⠀⠀⠀⠀
⠀⠀⠉⠛⠿⠿⠿⠟⠛⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

A cloud weighs around a million tonnes. A cloud typically has a volume of around 1km3 and a density of around 1.003kg per m3 – that's a density that’s around 0.4 per cent lower than the air surrounding it.

The grizzly bear is the state animal of California, even though one hasn't been spotted there since 1922.

⠄⣿⡀⠇⠄⠄⠄⢉⣛⣷⡄⢨⡀⣠⣤⣴⣿⣿⣿⣿⡿⠿⠶⠿⠿⣿⣷⠄⠄⠄
⠄⣿⣿⣬⣀⣠⣤⡘⣿⣿⣿⣦⣿⣿⣿⣿⣿⡿⠋⠄⠄⢀⣶⣶⣦⣌⢙⡀⠄⠄
⠄⣿⣿⣿⠿⠿⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⢡⣄⡀⣀⣼⣿⣿⣿⠟⣸⡇⠄⠄
⣆⠙⠉⣠⣤⡀⠄⠄⢩⣿⣿⢿⣿⣿⣿⣿⣿⣿⡿⣛⣋⣥⣤⣤⣤⣾⣿⡇⡀⠄
⣤⡀⠸⣿⣿⡿⠶⠶⢾⣿⣿⡸⣿⣿⣿⣿⣿⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣲⣧⠄
⢺⣿⣦⣬⣶⣾⣿⣿⣿⣿⣿⣿⢸⣿⣿⣿⣯⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃
⠄⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⡀
⠄⠘⢿⣿⣿⣿⣿⣿⣿⣿⣿⢟⣭⠭⠴⠒⠨⢭⠛⠛⠋⣼⣿⣿⣟⣛⣡⣴⣿⡇
⠄⠘⣷⣮⣿⣿⣿⣿⣯⡙⠁⠏⠄⠄⠄⠄⠄⠄⠄⠄⢰⣿⣿⣿⣿⣿⣿⣿⣿⠃
⠄⠄⠘⣿⣿⣿⣿⣿⣿⣷⡀⠄⣶⣦⠄⣠⣶⣿⣦⠄⣿⣿⣿⣿⣿⣿⣿⣿