Posted by
u/5thCharmer
15 hours ago
To avoid being heard by sharks, marine iguanas can stop their own hearts for up to 45 minutes.
Jolkien-RR-Tolkien
14 hours ago
Wait, so sharks can hear heartbeats?
Their senses are insane. They have an organ that can detect electric fields created by muscle movement. It’s so sensitive that it can even detect the electric fields from paralyzed prey. Something like 1 millionth of a volt.
Fun fact: you know that smell you get after a bit of light rain, that really earthy smell? It is called petrichor and one of the components is a product given off by a bacteria that dies when it gets wet. That is called geosmin. Humans can detect geosmin at concentrations 200,000 times more dilute than a shark can sense blood in the water (1 part in a million for sharks detecting blood, 1 in 200 trillion for humans detecting geosmin)
The University of Southern North Dakota at Hoople
Wossamotta U
As of 19 July, 2022, there are 23,288! (wait, whAT?! 
)
↑ GIF by ArMaP
A Dillingham pilot says he spotted the creature while flying passengers to Manokotak last week. He calculated that its wingspan matched the length of a wing on his Cessna 207. That’s about 14 feet.
“It is no measure of health to be well adjusted to a profoundly sick society.”
← This sequence is cropped (and looped) from the last 10 frames of the video captured on Sol 6 by a camera on the lander for NASA’s Mars Pathfinder rover. Not enough pixels, but still, mighty impressive. This evidence was discovered -way- back in the day by 
