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The species, which likely grew in the valley below Otzi's final resting place, only blooms between March and June.Found on the remains of Otzi's clothing were two pieces of birch fungus threaded onto narrow strips of hide.The fungus, which includes both anti-inflammatory and antibacterial compounds, was highly valued for its medicinal properties.It's also highly toxic to whipworms, a parasite discovered by researchers in Otzi's colon.Owing to the amazing preservative properties of ice, researchers were able to analyze a portion of Otzi's stomach and lower intestine to reveal the last meals he ate before his death.Roughly eight hours before the end, they discovered that he had consumed a meal of einkorn grain and a mix of cooked red deer and goat meat.Mixed in with these foodstuffs was also an important clue as to the time of year Otzi perished.

The style and materials used to make his tools come from at least three different areas in the Southalpine region and are reflective of northern Italian and Swiss Horgen culture, which shows he interacted with other transalpine people.A study of the stomach in 2011 showed that two hours before death, he ate another meal of ibex, a wild goat and yet more grains.Another study conducted in 2018 revealed he had a high proportion of fat in his diet that was supplemented with fresh and dried wild meat, cereals and toxic bracken (ferns).Using radiocarbon dating, scientists determined that he had perished in the Alps an astounding 5,300 years earlier.The preservation from the ice pocket he fell into was so thorough that his brain, internal organs, penis, pubic hair and one of his eyeballs were all completely intact.

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Measurement of radiocarbon was originally done by beta-counting devices, which counted the amount of beta radiation emitted by decaying atoms in the sample and not just the few that happen to decay during the measurements; it can therefore be used with much smaller samples (as small as individual plant seeds), and gives results much more quickly.

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