Up Next
Back to Show
Deep Look
Take Two Leeches and Call Me in the Morning
Season 5
Episode 6
The same blood-sucking leeches feared by hikers and swimmers are making a comeback... in hospitals. Once used for questionable treatments, leeches now help doctors complete complex surgeries to reattach severed body parts.
Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
3:17
They may look serene as they glide across the surface of a stream, but don't be fooled.
4:20
Because it's hoarding protein.
3:29
The South American palm weevil is bursting onto the scene in California.
3:06
During the highest tides California grunion stampede out of the ocean to mate on the beach
3:20
How long does it take to film a decorator crab putting on its seaweed hat?
3:15
When you live by the seashore, one day you're in, the next day you're lunch.
3:21
Brown pelicans hit the water at breakneck speed when they catch fish.
4:04
We've all heard that each and every snowflake is unique.
3:35
Thanks to The Great Courses Plus for sponsoring this episode of Deep Look.
3:38
Besides being hermaphrodites — all snails have both boy and girl parts.
3:26
It's not vanity. For cats, staying clean is a matter of life and death.
3:12
Those hundreds of powerful suckers on octopus arms do more than just stick.