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Archyde
April 4, 2021 by archyde
About 66 million years ago, a massive asteroid collided with what is now known as Yucatan, plunging Earth into darkness. The impact transformed the tropical rainforests, giving birth to flowers.
Today, tropical rainforests are a hotspot for biodiversity and play an important role in global climate systems. A new study was published today in
La science It sheds light on the origins of modern rainforests and can help scientists understand how tropical forests will respond to the rapidly changing climate of the future.
The study, conducted by researchers at the Smithsonian Tropical Research Institute (STRI), showed that an asteroid collision that ended the dinosaur reign 66 million years ago also caused the extinction of 45 % of plants in what is now Colombia, giving way. at risk of extinction. The reign of flowering plants in modern tropical forests.
Yellow fever was the first human disease to have a licensed vaccine and has long been considered important to an understanding of how epidemics happen and should be combated.
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IMAGE: Monkey being examined in Manaus area. Scientists will monitor areas in which these diseases are endemic to investigate the factors that trigger outbreaks view more
Credit: CREATE-NEO
By Maria Fernanda Ziegler | Agência FAPESP – Yellow fever was the first human disease to have a licensed vaccine and has long been considered important to an understanding of how epidemics happen and should be combated. It was introduced to the Americas in the seventeenth century, and high death rates have resulted from successive outbreaks since then. Epidemics of yellow fever were associated with the slave trade, the US gold rush and settlement of the Old West, the Haitian Revolution, and construction of the Panama Canal, to cite only a few examples.
Deep in the state of Mato Grosso, in the heart of Brazil’s vast Xingu National park, the inhabitants of the Indigenous village of Typa Typa can be heard day and night.
From their palm-thatched huts, perched on the southern banks of the Tuatuari river, some five kilometres (three miles) from the Leonardo Villas-Boas Post in the Upper Xingu, the Yawalapiti people of the circular village are mourning the death of their ancestral leader.
Chief Aritana Yawalapiti, 71, led his ethnic group for five decades and fiercely defended its traditions, lands and culture. For his family and Xingu supporters, he was a “living library” of the Yawalapiti people, one of the first tribes from the Arawak family lineage to have arrived in the region around 1100 AD.