What is the world's largest fish?
The harmless whale shark holds the title of largest fish, with the record being a 59 footer captured in Thailand in 1919.
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- Why has Roman concrete lasted so long?
“A 2023 MIT study found that small lime chunks in the mix let Roman concrete "self-heal": when cracks let in water, the lime reacts and fills them back in.”
Reference: MIT News (Seymour et al., *Science Advances*, 2023)
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