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TIL about the Irukandji jellyfish, a small and venomous jellyfish, that lives off the Australian coast. A sting, which initially feels like a mosquito bite, escalates to "Irukandji Syndrome", causing pain, cramping, headaches, vomiting, anxiety, and an impending sense of doom.

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NXMmQ TIL Albatrosses go years without setting foot on land, using a process called dynamic soaring to fly for long periods without flapping their wings.
XE86E TIL that the pain you feel from chewing on tin foil is called galvanic shock. Aluminum foil and other metals in your mouth have an electrochemical potential difference. Combined with saliva, which produces a wet, salty environment that’s ideal for the transfer of energy, creating a shock of voltage.
OoQ8Y In a new study in Science, a team of linguists at the University of Zurich uses biomechanics and linguistic evidence to make the case that the rise of agriculture thousands of years ago increased the odds that populations would start to use sounds such as f and v. The idea is that agriculture introduced a range of softer foods into human diets, which altered how humans' teeth and jaws wore down with age in ways that made these sounds slightly easier to produce.
neePd Some concern is beneficial but obsessing is often futile.
KAxw TIL that there are hundreds of people who suffer depression (and even suicidal thoughts), because Avatar (the movie) isn’t real and they can never go to Pandora.