Home » 2013 » July

• 

  A Carolina Wren Family Attacked by a Chipmunk

  July 30, 2013 at 6:25 pm / Natural history, NatureDocumentaries.org, Short Observations, Video, Wildlife Documentaries

  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 […]

  Continue reading »

• 

  NASA Tracks Chelyabinsk Meteorite Dust in the Atmosphere

  July 27, 2013 at 1:42 pm / Global Patterns, Video

  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 […]

  Continue reading »

• 

  Metamorphosis – Tale of a Wetland (Bryan Maltais 2012)

  July 24, 2013 at 12:08 pm / Ecological Documentaries, Video, Wildlife Documentaries

  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 […]

  Continue reading »

•  
• 

  A Tour of a Section of Human Chromosome 11

  July 21, 2013 at 8:17 pm / Evolution, Human Nature, Molecular Nature, Video

  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 […]

  Continue reading »

• 

  Ant Tending Treehopper Larvae

  July 18, 2013 at 12:52 am / Natural history, NatureDocumentaries.org, Short Observations, Video, Wildlife Documentaries

  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 […]

  Continue reading »