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Desde 1995: 17 notícias
The New Face of Ancient South American People
Publicado em 10 de novembro de 2018
The history of the peopling of the Americas has just been interpreted afresh. The largest and most comprehensive study ever conducted on the basis of fossil DNA extracted from ancient human remains found on the continent has confirmed the existence of a single ancestral population for all Amerindian ethnic groups, past and present.
Over 17,000 years ago this original contingent crossed the Bering Strait from Siberia to Alaska and began peopling the New World. Fossil DNA shows an affinity [...]
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Cappuccino Made With Jackfruit Seed Flour Has Chocolate Aroma
Publicado em 28 outubro 2018A study conducted in Brazil shows that flour made from roasted jackfruit seeds can replace cocoa powder in a mixture of milk and coffee used to make cappuccino. Cappuccino made with jackfruit instead of cocoa powder. According to a new study, roasted jackfruit seeds can replace between 50% and 75% of the cocoa that is blended with milk and coffee to make cappuccino without impairing flavor or aroma. "Flour made from roasted jackfruit seeds naturally releases a mild chocolate aroma," said food [...]ver notícia -
Extrasolar Asteroid Has Been Orbiting the Sun for 4.5 Billion Years
Publicado em 21 maio 2018The Solar System is much vaster and more complex than is usually assumed. The Sun's gravitational pull on the gravitational fields of the nearest stars is estimated to extend for approximately two light-years (125 astronomical units), meaning the light emitted by the Sun takes approximately two years to reach the outer edge of the Solar System. This enormous gravitational niche is home to millions of objects, from planets and moons to comets, asteroids and meteoroids. One object differs from [...]ver notícia -
Critically-Endangered South American Forests Were Man-Made More Than A Thousand Years Ago
Publicado em 17 maio 2018Critically endangered South American forests thought to be the result of climate change were actually spread by ancient communities, archaeologists have found. Huge swathes of land in Chile, Brazil and Argentina are covered with millions of Araucaria, or monkey puzzle trees, thanks to people planting or cultivating them more than a thousand years ago, a new study shows. Recent logging means the landscape is now one of the world’s most at-risk environments. It had been thought the forests [...]ver notícia -
How Good Gut Bacteria Affect the Human Genome
Publicado em 09 janeiro 2018Good bacteria in the gut can produce a chemical signal that affects the human genome The changes in the genome may help to fight infections and prevent cancer The chemical signal is produced by bacteria from the digestion of fruits and vegetables Scientists from the Babraham Institute near Cambridge in collaboration with colleagues from Brazil (here and here) and Italy have discovered a way that good bacteria in the gut can control genes in our cells. The work, published today (9th January) [...]ver notícia -
Bizarre Bee-Zed Asteroid Orbits the Sun in the Opposite Direction as Planets
Publicado em 27 junho 2017In our solar system, an asteroid orbits the Sun in the opposite direction to the planets. Asteroid 2015 BZ509, also known as Bee-Zed, takes 12 years to make one complete orbit around the Sun. This is the same orbital period as that of Jupiter, which shares its orbit but moves in the opposite direction to the planet's motion. The asteroid with the retrograde co-orbit was identified by Helena Morais, a professor at São Paulo State University's Institute of Geosciences & Exact Sciences [...]ver notícia -
New Model for Asteroid Belt Formation
Publicado em 07 abril 2017In 1801, when searching for a planet believed to exist between the orbits of Mars and Jupiter, Italian priest and astronomer Giuseppe Piazzi (1746 - 1826) discovered Ceres, a dwarf planet almost 1,000 miles in diameter. Ceres is the largest object of the so-called asteroid belt, but is far from the only one. It is estimated that the belt is made up of more than 1 million of them. For more than 200 years astronomers have tried to find out how the asteroid belt formed and why there is no planet [...]ver notícia