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TIL: Narwhals’ ‘horn’ is actually an erupted left tooth, that can sense temperature, salinity, particle density, and can 'feel’

Read more science.howstuffworks.com

via reddit.com

WZx9 TIL that our brains do not reach full maturity until at least our mid-20s.
wbVM TIL that divers searching a sunken wreck saw a hand in the murky water, grabbed it - and it grabbed back. More than 60 hours since the ship capsized, the cook was still alive. The sea water had acted as a CO2 scrubber keeping his compressed air pocket breathable.
OOX TIL Jackie Chan not only voiced the leading male role in the Chinese version of “Mulan” but also preformed the song “I’ll Make a Man Out of You.”
BgKvr TIL that over half of the world’s internet users got online for the first time after 2010. As of 2021, there were about 4.9 billion internet users globally, up from 2 billion in 2010.
mnno TIL bottlenose dolphins have longest memory among non-humans - they can recognize whistles of their mates after being separated for more than 20 years