Years ago, working night shift on a psychiatric unit, I heard a lady arguing loudly. Entering her room to see if I could be of assistance, she looked at me afraid and said, “He is right behind you, look!”
Elephant shrews are terrestrial and are active during the day. Their ears and eyes are large, and, when alarmed, they run on their toes swiftly along paths that they construct and maintain, sometimes leaping over obstacles.
These pearls are gorgeous. Freshwater pearls can take between one to six years to form, and saltwater pearls from five to 20 years. The longer the pearl stays in the shell the larger it gets due to the continuous nacre coating.
Human circadian rhythms tend to be closely tied to the rise and fall of the sun each day, occurring in fairly regular 24-hour cycles. But by no means is this how all organisms’ internal clocks operate. Science News recently compiled seven of the strangest circadian rhythms.