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.
Yellow-eyed penguins are easily identifiable among other species because of the yellow color of their eyes. They have a light yellow stripe around each eye that continues and joins in the back of their head.
Treefrogs are adapted for an arboreal (in the trees) existence, with long limbs and digits that help them cling to twigs and bark. They also have large suction pads or adhesive discs at the tips of their toes,…
Tubenoses are a group of marine birds that spend the majority of their lives at sea, only coming to land to nest. Members of this group include the well known albatrosses and the lesser known shearwaters and petrels.