Home » Video (Page 15)

  • Fish Tool Use Documented in the Wild – (2016)

    Fish Tool Use Documented in the Wild – (2016)

    The news that a black spotted tuskfish, Choerodon schoenleinii, (Valenciennes, 1839) was observed using a tool made the hearts of ethologists race. Here you can see a few recorded examples of the behavior from different locations and species belonging to the same genus within the wrasse family. As the story goes the behavior was first observed by Scott Gardner in Australia. On November 12th 2006, Mr. Gardner did an 18-m dive in the Keppel region of the southern Great Barrier […]

    Continue reading »

  • X Inactivation and Epigenetics – Etsuko Uno & Drew Berry / WEHI (2012)

    X Inactivation and Epigenetics – Etsuko Uno & Drew Berry / WEHI (2012)

    Why all calico cats are female? In all mammals sex is genetically determined by X and Y chromosomes. In Humans females carry two X chromosomes (XX). Males carry both X and Y chromosomes (XY). The mammalian Y chromosome has began to evolve from the X chromosome at about 170 million years ago. For some strange genetic recombinational quirk that happened in the ancestor of all mammals Y chromosomes lost their ability to exchange information with X. Currently, more than 95% […]

    Continue reading »

  • Kon-Tiki Expedition – A Test of a Hypothesis for Human Gene Flow (1950)

    Kon-Tiki Expedition – A Test of a Hypothesis for Human Gene Flow (1950)

    Kon-Tiki was a legendary expedition that was carried out in 1947 by Norvegian anthropologist Thor Heyerdahl. The expedition tested a hypothesis whether Pacific Islands could have been colonized from Americas and thus wanted to demonstrate that waterways were not barriers but means of transportation and gene flow for human populations. Peopling of the Pacific is a fascinating story. The Polynesians were without question the greatest open ocean voyagers in the human history. They built double-hulled canoes and traveled over the […]

    Continue reading »

  •  
  • Animations of Unseeable Biology – Drew Berry – TED Talk (2011)

    Animations of Unseeable Biology – Drew Berry – TED Talk (2011)

    Drew Berry introduces us to the fascinating world of molecules. Since the invention of X-ray crystallography our depth of understanding the molecular nature of things have skyrocketed. Year 2012 marked the centennial of the discovery of X-ray chrystallography by the Australian physicist William Lawrence Bragg who shared the Nobel Prize with his father in 1915. The technique was so powerful that since its discovery, it generated 28 Nobel Prizes including the discovery of DNA. the famous X-ray chrystallographical image #51 […]

    Continue reading »

  • Anole Lizard Aggression – Neil Losin (2011)

    Anole Lizard Aggression – Neil Losin (2011)

    We humans rarely have punch ups with each other to decide who will mate. However, an anole lizards life is frequently interrupted by brawls. Neil Losin is an evolutionary biologist from UCLA who studies aggressive behavior among anole lizards. Anole lizards not only have punch ups among each other (intraspecific aggression) but they also have such interactions with other species (interspecific aggression). This is when things get even more interesting. In less than 10 minutes this documentary outlines the research […]

    Continue reading »

  • Learning to Live on the Moon – PBS

    Learning to Live on the Moon – PBS

    Energy flows, nutrients cycle. This is how we can define working principles of an ecosystem in a nutshell. Our planet has a very complex land-air-water interaction and we are only beginning to understand the behavior of these systems by simplifying them in enclosed systems such as Landscape Evolution Laboratory (LEO). Due to its proximity, the Moon appears to be the most convenient celestial body to colonize. The Moon is so close that it can even occasionally get shielded by the […]

    Continue reading »

  •  
  • Understanding Our Moon – NASA/SVS

    Understanding Our Moon – NASA/SVS

    The Moon has been a very influential body on life on Earth. Some argue that having a satellite like the Moon is a prerequisite for life in other planets. The Moon has a stabilizing effect on rotation axis of our planet. Without it, the axis would wobble more erratically making ice ages and inter-glacial warming periods more extreme and sudden. Understanding our Moon will help understand evolutionary history of our planet. After all, both bodies have started forming from the […]

    Continue reading »

  • City Farms – KQED/QUEST (2013)

    City Farms – KQED/QUEST (2013)

    On the forefront of Good Food Revolution Will Allen of Milwaukee demonstrates a working Urban Farm. He defines his effort as establishing oasis in a “food desert”. The program prepared by QUEST gives a brief biographical sketch and highlights from the project. Following a significant career in basketball, Allen decided to go back to farming. In 2008 he was granted a prestigious MacArthur Foundation “genius” grant for his influential contributions to the urban agricultural practices. “The Great Migration transformed the […]

    Continue reading »

  • Kars Ardahan Documentary – Alkım Ün (2007)

    Kars Ardahan Documentary – Alkım Ün (2007)

    Director of the KarsArdahan documentary is an emerging Turkish documentarist Alkım Ün. In 2009 he received an award in Boston Turkish Film Festival with this production. Alkım Ün has a degree in biology education and has a particular talent in “reading the landscape” with the eyes of a biologist. Just before the project he had made lengthy observations on wildlife of the region. Kars – Ardahan Plateau is a biologically and geologically distinct region of Turkey. It sits between two […]

    Continue reading »

  •  
  • Conserving Colombia’s Cotton-Top Tamarin – Federico Pardo (2011)

    Conserving Colombia’s Cotton-Top Tamarin – Federico Pardo (2011)

    About the size of a squirrel, the cotton-top tamarin (Saguinus oedipus) is a New World primate. It has a characteristic shock of white hair on it’s head. Males and females do not vary in size (not sexually dimorphic). The cotton-top tamarin was declared endangered in 1973 following the exportation of 20,000-40,000 tamarins to the United States for use in biomedical research. Cotton-top tamarins were found to spontaneously develop colorectal cancer and for this reason served as an ideal model for […]

    Continue reading »

  • The World’s Fastest Runner – Greg Wilson – National Geographic (2012)

    The World’s Fastest Runner – Greg Wilson – National Geographic (2012)

    A well-designed filming set up to capture the motions of running Cheetahs. Since late MIT professor Doc Edgarton’s time highspeed cameras have evolved wonderfully enabling technical capabilities for producing great slow motion films. In this production the filming crew used a Phantom Flex highspeed recording camera. The following talk by the director Greg Wilson gives us the behind-the-scenes view of the project. The entire set up was constructed on the running alley specially designed for exercising the Cheetahs of Cincinnati […]

    Continue reading »

  • Giant Ichneumon Wasp (Megarhyssa macrurus) Ovipositing

    Giant Ichneumon Wasp (Megarhyssa macrurus) Ovipositing

    Giant Ichneumon wasp (Megaryssa macrurus, Linneaus 1771) ovipositing. 10th of August 2013, Georgia State Botanical Garden, Athens, GA. 3:47 pm. This observation has been registered in iNaturalist.org with ID# 418639. Oviposition marks the beginning of the life cycle of all insects including parasitoid wasps. Females of Megarryhssa macrurus (Hymenoptera: Ichneumonidae) are specialized to lay their eggs in the burrows of wood eating Pigeon Tremex Horntail (Tremex columba) larvae between June and September. Only one egg is deposited per host larva […]

    Continue reading »

  •  
  • What’s Really Warming Up Our Planet? NASA – SVS (2015)

    What’s Really Warming Up Our Planet? NASA – SVS (2015)

    NASA’s Scientific Visualization Studio (SVS) produced yet another visual to show how industrial and natural factors have been contributing to the global warming. These factors are wobbling of Earth’s axis, solar activity, volcanoes, land use, ozone pollution, aerosol pollution, greenhouse gases and their combined effects. The case is rather clear. Combined effects of man made factors follow the trajectory of warming closely. Since 1880 our planet warmed 1.4 degrees Fahrenheit and continues to increase. The atmospheric carbon concentration has passed […]

    Continue reading »

  • The Day The Mesozoic Died HHMI – Sean B. Carroll (2012)

    The Day The Mesozoic Died HHMI – Sean B. Carroll (2012)

    This is one of the four educational video series by Sean B. Carroll produced for communicating evolution to public with the support of HHMI. Today we know the cause of the disappearance of the dinosaurs at the end of the Cretaceous period. This knowledge was produced by the meticulous coordinated work of many scientists. The Day The Mesozoic Died focuses on how scientists do the detective work using the scientific method. The discovery that an asteroid struck the Earth 66 […]

    Continue reading »

  • How Does the Purple Bacteria Photosynthesize? Beckman Institute-UIUC (2015)

    How Does the Purple Bacteria Photosynthesize? Beckman Institute-UIUC (2015)

    Imagine a time when our young Earth was spinning much faster and days were only 8 hours! Our sun was much cooler and less bright than today. There was no oxygen in the atmosphere. Those were the conditions when first photosynthetic organisms with purple pigments evolved in liquid environments. In this animation we see one such ancestral form of early anoxic photosynthesis taking place in the purple bacteria Rhodobacter sphaeroides in which oxygen is not produced. Life evolved into oxygen […]

    Continue reading »

  •  
 
 
 
Nature Documentaries shared on wplocker.com