Whale voices only sound sad when recorded by above water microphones. The distinctive sound we call “whale song” is actually very different underwater, and even more so when translated by whale ears, which have cochleae 50 times larger than those of humans.
Here is a sample of whale song as whales hear it underwater:
Magical Paths Begging To Be Walked
Roads and paths pervade our literature, poetry, artwork, linguistic expressions and music. Even photographers can’t keep their eyes (and lenses) off of a beautiful road or path, which is why we collected this list of 28 amazing photos of paths.
Paths like these have a powerful grip on the human imagination – they can bring adventure, promise and change or solitude, peace and calm. There’s nothing like a walk down a beautiful path to clear your head – or to fill it with ideas!
I’ll leave you with an excellent quote from J. R. R. Tolkien’s works while you enjoy these images; “It’s a dangerous business, Frodo, going out your door. You step onto the road, and if you don’t keep your feet, there’s no knowing where you might be swept off to.“
- Autumn In The White Carpathians
- Rhododendron Laden Path, Mount Rogers, Virginia, USA
- Spring In Hallerbos Forest, Belgium
- Autumn Path In Kyoto, Japan
- Autumn Path
- Bamboo Path In Kyoto, Japan
- Hitachi Seaside Park Path In Japan
- Dark Hedges In Ireland
- Winter Forest Path, Czech Republic
- Path Under Blooming Trees In Spring
Victoria’s show is designed to be sort of a video lab notebook, part educational, part experimental. YouTube already has some pretty great science shows (*cough*cough*) but I’m happy to welcome Victoria to the fold. And Iggy too, I guess.
In this episode, in addition to meeting the main characters and hearing some inspiring words about the importance of failure in the scientific method, we learn a bit about cardiac electrophysiology, those nerve impulses that control our heartbeat.
I find that GIF hypnotic. The human heart has its own pacemakers built in. One is known as the sinoatrial (SA) node, the other as the atrioventricular node (AV). These are the upper and lower red dots above, respectively.
Cardiac cells are interesting because they are sort of like nerves and muscle cells combined, they can do work, but they can also propagate electrical impulses (although we should be clear, they are definitely classified as muscle cells).
Cells of the SA node sort of “leak” charge at a constant rate, which makes them fire (or send an electrical impulse) at that same constant rate. The result is a nice rhythmic heartbeat, controlled by its own cells.
When a heartbeat is initiated by a stray impulse at the bottom (ventricular) region of the heart, that’s what is known as a premature ventricular contraction, or PVC. That’s what happens to Iggy in this episode.
Single, isolated PVCs are pretty harmless, and most of us probably get them from time to time without even noticing. Leave it to Iggy to kill himself by trying to fix a problem that doesn’t exist.
At least Victoria was there to shock him back to life! Wonder if she’ll do that again at some point…?
Looking forward to doing a “Science of Frankenstein MD” episode of SciShow. Thanks to Joe for doing all the science consulting on the show. I LOVE how it’s turned out…such a cool mix of comedy and plot and information and quirkiness. So cool! The first three episodes are already live!!
throws paper airplanes made from x files at scully
(i dont usually do requests but this was too good to pass up)
"That guy’s got swag," said the officer, looking down at the jolly man camped by a billabong under the shade of the coolabah tree
Illustration for the cover of La Vie Parisienne by Georges Léonnec, April 1924