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Big history

Big history

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Related:  Evolution du vivant

First ever record of insect pollination from 100 million-years ago Amber from Cretaceous deposits (110-105 my) in Northern Spain has revealed the first ever record of insect pollination. Scientists have discovered in two pieces of amber several specimens of tiny insects covered with pollen grains, revealing the first record of pollen transport and social behavior in this group of animals. Today, more than 80% of plant species rely on insects to transport pollen from male to female flower parts. Pollination is best known in flowering plants but also exists in so-called gymnosperms, seed-producing plants like conifers. Although the most popular group of pollinator insects are bees and butterflies, a myriad of lesser-known species of flies, beetles or thrips have co-evolved with plants, transporting pollen and in return for this effort being rewarded with food. During the last 20 years, amber from the Lower Cretaceous (110-105 my) found in the Basque country in Northern Spain has revealed many new plant and animal species, mainly insects.

Probe into Amelia Earhart mystery Washington - Seventy-five years after Amelia Earhart disappeared over the Pacific, a research team is setting off on 2 July with high hopes of resolving the mystery surrounding the pioneering aviatrix. For the tenth time in 23 years, the International Group for Historic Aircraft Recovery (TIGHAR) will set off for Nikumaroro island in Kiribati to establish whether Earhart survived the apparent crash of her aircraft. "This time, we'll be searching for debris from the aircraft," TIGHAR's founder and executive director Richard Gillespie, himself a pilot and former aviation accident investigator, told AFP. Earhart vanished on 2 July 1937 at age 39 with navigator Fred Noonan during the final stage of an ambitious round-the-world flight along the equator in a twin-engine Lockheed Electra. The holder of several aeronautical records, including the first woman to cross the Atlantic by air, Earhart had set off from New Guinea to refuel at Howland Island for a final long-distance hop to California.

NGAkids SEA-SAWS SEA-SAWS is fun for kids of all ages. Select photographs of natural and man-made objects, then arrange the pieces to create a seascape or an abstract composition. The BUILD tool helps you construct animated characters and set them in motion. Human Migration: The Story of a Community Grades K-2 Overview: Around the world and in our own communities, people move in and out of places every day, and they have done so throughout human history. Weight of the Soul Claim: A physician once placed dying patients upon a scale in order to measure the weight of the human soul. Example:[Evans, 1946] Those who believe that the body becomes lighter [at the moment of death] seem to think that the soul has weight, weight that must of necessity depart with it, and — with that brisk disregard of strict veracity which so frequenly marks discussions of this nature — have claimed that dying men, at the very moment of their decease, have been placed on delicate scales that have recorded their mortuary degravitation. But these persons have never been able to specify in just what ghoulish laboratory this took place, or what private home was so interestingly equipped, or the names and addresses of the relatives who so commendably placed scientific and religious curiosity before sentimental concern for the patient's comfort.1 Yet as much as we believe in the concept of "soul," this life spark remains strictly an article of faith.

Children Educate Themselves III: The Wisdom of Hunter-Gatherers For hundreds of thousands of years, up until the time when agriculture was invented (a mere 10,000 years ago), we were all hunter-gatherers. Our human instincts, including all of the instinctive means by which we learn, came about in the context of that way of life. And so it is natural that in this series on children's instinctive ways of educating themselves I should ask: In the last half of the 20th century, anthropologists located and observed many groups of people—in remote parts Africa, Asia, Australia, New Guinea, South America, and elsewhere—who had maintained a hunting-and-gathering life, almost unaffected by modern ways. Although each group studied had its own language and other cultural traditions, the various groups were found to be similar in many basic ways, which allows us to speak of "the hunter-gatherer way of life" in the singular. What I learned from my reading and our questionnaire was startling for its consistency from culture.

Web 2.0 Tools A tag cloud (a typical Web 2.0 phenomenon in itself) presenting Web 2.0 themes. An interactive version is available here. Web 2.0 describes World Wide Web sites that use technology beyond the static pages of earlier Web sites. Alternate Histories: 7 More Ways the World Could Be Completely Different We previously covered some of the many alternate histories out there. Here are seven more intriguing ways the world could be completely different. 1. What if the Romans won the Battle of the Teutoburg Forest? Effect: No one would speak English.

Related:  Big History ProjectLearningINVESTIGACIÓN