Jellyfish and lamprey (an eel-like creature) are sort of the expert, efficient swimmers of the seas. And hey, they have some competition. So it's meaningful that a recent study has findings on their wriggly secrets.
A seal riding atop a humpback whale – like this photo from Eden, New South Wales, shows illustrates an extremely rare occurence but other animals routinely help each other out.
In the spirit of Oct. 15, National Fossil Day, a new study has come out describing the earliest-known lamprey larva fossils, recently discovered in Inner Mongolia. While few people take the time to explore the ancient origins of these eel-like creatures, their evolutionary saga in fact helps shed light on humans' biological roots.