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TIL the US Navy exploded several 500 ton shots of TNT in Hawaii during 1965 to determine the damage caused by nuclear weapons without radiation risks. The craters left behind are inland but connected to the Pacific ocean underground.

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nW47o TIL that Russia has 10 ‘nuclear cities’ which were kept a secret from even Russias population until 1993, no one was allowed in or out yet it had full functioning populations in.
yNVp TIL- There is a tribe of people in an almost inaccessible Himalayan valley that made a decision to bring their own race to extinction by choosing to not have children. If you broke the no breeding tribal rule, you would be banned from the village, which was in essence a death sentence.
xVk8D TIL a chair is used for lion taming due to how a cat's brain has evolved to only deal with a single thing at a time. The four legs of the chair confuse the lion, rendering it mostly harmless.
Me8nm TIL Denali Flavors, Inc., the company that makes Alaska-themed ice cream flavors "Moose Tracks", "Caramel Caribou", and "Bear Claw" is based in Michigan. The name simply refers to the national park and mountain, and is considered, "a unique connection to the 'Alaskan Classics' ice cream flavors."
9wy7M TIL UV rays can cause skin damage in as little as 15 minutes of exposure, even on cloudy days. Studies show that ultraviolet (UV) radiation can penetrate clouds and cause skin damage even when the sun is not visible. This is why skin protection, such as sunscreen or clothing, is important always.