What's the connection between cancer and pregnancy? A protein already known to fight cancer has been found to be involved in embryos implant in the uterus, according to a research published in Nature.The p53 protein was known to act in many anticancer processes, like DNA repair and apoptosis (cell death, impedin...
Could you imagine life without pizza or ketchup? If the answer is no, then you should learn some things about the tomatoes. Wild tomatoes originate from the Andes Mountains. Ancient Indians ate them, but did not cultivate them. But when the tomatoes had reached Mexico, the Aztecs were very pleased of it and called it...
Beetles make the most numerous group of insects. They form the order Coleoptera ("sheathed wing") because of their elytras (thickened outer pair of wings). 25% of all species on Earth are beetles and they make for 40% of all described insects but there may be at least 5 million undescribed beetle species. They live a...
1.A rain forest represents an explosion of life, the peak of biological diversity on Earth. But the trees that make the current rainforest emerged during the Cretaceous, at the sunset of the dinosaur realm. So, when did the first rainforest appear? And how did it look like?The underground workings of a coalmine, in ...
From about 15,000 years, humans rely on one animal as guardian: the dog. In time, we have created more aggressive, more massive, more dreadful dog breeds for this purpose. But only dogs save our asses?1.There is the famous legend (and historical fact) of the geese that saved Rome in 300 BC from the attack of the Celt...
The Aztecs founded their bloody empire around A.D. 1200, and their civilization lasted only 300 years, while their empire dominated the area only 100 years before falling under the sword of the conquistadors. Still, at its peak, the empire spread from central Mexico to Guatemala, and it was one of the most advanced c...
1.European sailors navigating, a few centuries ago, in tropical waters could not believe their eyes: they were seeing mermaids, common in the sea folklore. The creature were fish-like from the waist beyond, had a pair of breasts in the chest area, and their flippers and heads vaguely resembled human head and arms fro...
The cannibal doctor Hannibal Lecter, the infamous character from "The Silence of the Lambs" scandalized the world, but he revealed the human cruelty at its highest, which was believed to hide under the cover of civilization. But after the creepy case of the Viennese cannibal from past August, when police found Robert...
1.The name "dinosaur" comes from Old Greek "deinos" ("terrible") and "saurus" ("lizard"), and was advanced by Richard Owen in 1841. The dinosaurs emerged at the end of the Triassic, about 225 million years ago, from a group of reptiles called Archosauria. Archosauria was a sister group to lizards and they gave birth ...
Calcareous rocks, like limestone and marble (a rock modified by heat and pressure), are made mainly by calcite, a mineral form of the calcium carbonate. The calcite is insoluble in pure water, but the rain water contains carbon dioxide, coming from air or soil, and forms a weak acid that react with the calcite, resul...
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