› added 1 month ago

5

TIL that goats have rectangular pupils, which give them a wider field of vision to spot predators.

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via reddit.com

9wAG6 TIL In 1953, US Air Defense Command tracked a UAP in restricted airspace over Lake Superior. A Northrop F-89C Scorpion was scrambled to intercept the UAP. The F-89 simply vanished from radar once it engaged with the UAP and never returned. Zero of the wreckage or pilots' remains were ever recovered.
l7oZN TIL studies show that SPF-30 sun screen is just as good at reducing skin damage and skin cancer risk as higher SPF varieties and often provide a better balance of blocking UVA and UVB rays.
oRrKA TIL about the Tree of 40 Fruit, where multiple 'donor' branches are grafted together so that a single tree produces dozens of fruits such as apricots, cherries and plums
RmY4 TIL that the largest building with completed construction plans is a 10,000m (33,000 ft) tower that would cost 16 trillion USD to construct with a 100-150 year construction time, but it can house 30 million people.
RoPQ TIL that runners wearing top-of-the-line trainers are 123 per cent more likely to get injured than runners in cheap ones. This was discovered as far back as 1989, according to a study led by Dr Bernard Marti, the leading preventative-medicine specialist at Switzerland’s University of Bern