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It is generally believed that Neolithic people found that by chewing this stuff if they had gum infections it helped to treat the condition," said Trevor Brown from the University of Derby.
"Over the years the leather or fabric disappeared, and all that's left is the teeth.
They're all pointing in the same direction, so it looks a lot like a modern handbag flap," they said.
The bedding had accumulated at the Sibudu Cave site in Kwa Zulu-Natal (map) over a period of 39,000 years, with the oldest mats dating to 77,000 years ago.
Radioactivity and radioactive decay are spontaneous processes.
It was identified as the world's oldest marijuana stash.
A barrage of tests proves that the marijuana possessed potent psychoactive properties and casts doubt on the theory that the ancients only grew the plant for hemp in order to make clothing, rope, and other objects. Lead author Ethan Russo told Discovery News that the marijuana "is quite similar" to what's grown today.
Students often struggle with this concept; therefore, it should be stressed that it is impossible to know exactly when each of the radioactive elements in a rock will decay.
Statistical probablity is the only thing we can know exactly.
(Source) In 2011, archaeologists found what they believe is the world's oldest mattress in a cave in South Africa.
The mattress, which consists of layers of reeds and rushes, was discovered at the bottom of a pile of bedding made from compacted grasses and leafy plants.
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