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  • A Carolina Wren Family Attacked by a Chipmunk

    A Carolina Wren Family Attacked by a Chipmunk

    On April 21 2013, a family (4 juveniles 2 adults) of Carolina Wrens (Thryothorus ludovicianus) were hanging around a downed tree. The chicks were learning to forage while being actively fed by their parents. In the middle of all this a chipmunk approached which made both parents rather nervous. Then the chipmunk made a darting attack. The wren parents defended their chicks quite effectively. One parent dove on the chipmunk with a flying kick. It was so powerful that the […]

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  • NASA Tracks Chelyabinsk Meteorite Dust in the Atmosphere

    NASA Tracks Chelyabinsk Meteorite Dust in the Atmosphere

    Our planet is no stranger to meteorites. Take a look in the Moon and see what has been erased from the surface of the Earth by tectonic movements. Evolution of life took many sharp turns because of catastrophic impacts. On February 15, 2013 a meteor weighing 10,000 metric tons exploded only 23km above the city of Chelyabinsk in Russia. The so called airburst event created a very strong ultrasound that was picked up by listening stations established to monitor nuclear […]

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  • Metamorphosis – Tale of a Wetland (Bryan Maltais 2012)

    Metamorphosis – Tale of a Wetland (Bryan Maltais 2012)

    Nature reveals its ability to heal when amphibians, reptiles, birds and plants repopulate a recently abandoned rock quarry to create a flourishing wetland in Fort Collins, Colorado. However, the scarred earth of this healing quarry causes salamanders to undergo a rare and peculiar shift in their morphology. Time-lapse sequences show seasonal changes of the wetland over one year accompanied by underwater footage of amphibians breeding and undergoing metamorphosis. Everybody is familiar with the metamorphosis of butterflies and moths. The following […]

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  • A Tour of a Section of Human Chromosome 11

    A Tour of a Section of Human Chromosome 11

    This video produced by Cold Spring Harbor Laboratories takes us on a tour of about 650,000 nucleotides from the tip of the short arm of human chromosome 11. From a distance we can discern 28 genes, denoted by red and yellow blocks. The red exons carry the DNA code for protein, while the yellow introns are noncoding. Also prominent are more than 500 transposons, or jumping genes, denoted by blue and purple blocks. If we zoom in, we can take […]

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  • Ant Tending Treehopper Larvae

    Ant Tending Treehopper Larvae

    May 23rd 2009 in Georgia State Botanical Garden in Athens, GA, USA. The ant (Formica palidefulva) is tending a number of treehopper (Entylia carinata) nymphs. If watched carefully, the honeydew secreted by the instars are visible at [00:22, 00:28, 00:37] seconds into the video. The mother treehopper is still sitting around the midrib of the thistle where she laid her eggs (dark necrotic patch around her). The story got published in the November 2009 issue of the Atlas Magazine under […]

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  • Nice Guys Finish First – Richard Dawkins (1987)

    Nice Guys Finish First – Richard Dawkins (1987)

    In this BBC documentary Richard Dawkins explores the evolution of cooperation. The problem has been discussed intensely since Darwin’s time and is still being investigated scientifically. Cooperative species are quite successful but rare. Social insects (ants, wasps, bees and termites) make up only 3 percent of animal diversity yet they may constitute up to 50 percent of the total animal biomass in land habitats. Among 43,678 known species of spiders cooperative behavior evolved in only a few. How could a […]

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