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todayilearned

Feb 16, 2020

TIL Divers are teaching other fish to eat the invasive lionfish.

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todayilearned

Jan 18, 2020

TIL only four people have been at the bottom of the Mariana Trench, called the Challenger Deep (about 11000 meters or 36000ft down). For reference, 12 people have walked on the Moon.

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todayilearned

Nov 12, 2019

TIL The Blue Hole is a 120-metre-deep sinkhole, five miles north of Dahab, Egypt. Its nickname is the “divers’ cemetery”. Divers in Dahab say 200 died in recent years. Many of those who died were attempting to swim under the arch. This challenge is to scuba divers what Kilimanjaro is to hikers.

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todayilearned

Aug 26, 2019

TIL Sperm whales are the loudest animal on the planet, sperm whales uses echolocation and vocalization as loud as 236 decibels

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todayilearned

May 16, 2019

TIL because regular air is toxic at high pressures, deep sea divers live on a mix of helium and oxygen, meaning they live and speak with a squeaky helium voice for around a month while working.

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todayilearned

Apr 08, 2019

TIL that the clicking noise sperm whales use to communicate is so loud that it can be heard by other whales thousands of miles away and can make a human body intensely vibrate to the point of death.

02014 animal communication animals author citizen science clicking clicks communication conversations at the interval deep deep book diving freediving long now long now foundation mammals ocean ocean exploration san francisco sea sea life sf sperm whales the interval the interval at long now whales

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