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  • The Shape of Life: Sponges – PBS (2002)

    The Shape of Life: Sponges – PBS (2002)

    August 2, 2015 at 9:30 pm / Evolution, Natural history, PBS Nature, Video

    Evolutionarily, sponges are considered to be the oldest and most ancestral surviving species of the multicellular animal lineage going back to more than 750 million years ago. They are notorious filter feeders. Famous German zoologist Ernst Haeckel quite accurately illustrated many sponges as early as 1872. They have an extraordinary capacity to filter dissolved nutrients through a specialized group of cells called choanocyte. Encrusting sponge tissues are made of choanocytes forming canals that converge at the openings called oscula where […]

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  • Crippled Cranefly Orchid (Tipularia discolor) (2014)

    Crippled Cranefly Orchid (Tipularia discolor) (2014)

    March 23, 2015 at 3:12 pm / Ecological Documentaries, Evolution, Natural history, NatureDocumentaries.org, Short Observations, Video, Wildlife Documentaries

    Crippled Cranefly Orchid (Tipularia discolor). Recorded on August 9th 2014, Georgia State Botanical Garden, Athens, GA, USA. The genus Tipularia has three species. Crippled cranefly orchid (Tipularia discolor) is the only species found in North America. The other two species are Asian found in the Himalayas and Japan. Tipularia discolor grows in organic humus-rich soils of closed canopy oak-pine forests in the Eastern United States. It is protected as Threatened, Endangered, or Rare in Florida, Massachusetts, Michigan, New York, Pennsylvania. […]

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  • How Chameleons Change Color? (2015)

    How Chameleons Change Color? (2015)

    March 18, 2015 at 10:11 am / Evolution, Molecular Nature, Natural history, Short Observations, Video

    Long projectile tongue, independently movable eyes and rapid color change. Chameleons are indeed very interesting animals (see the detailed account of Aristotle at the bottom of this post). Main video is a concatenation of all five supplementary materials associated with the a study demonstrating color change in Chameleons. You can view them individually below. The following video by The Economist makes a successful summary based on the same material: Reproductively mature chameleon males rapidly switch on bold threatening colors when […]

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  • The Origin of Birds – Dan Lewitt – HHMI (2015)

    The Origin of Birds – Dan Lewitt – HHMI (2015)

    March 5, 2015 at 10:52 am / Evolution, Video

    The Great Transitions is a three part documentary covering evolutionary origins of land vertebrates tetrapods, birds and Humans. In this second installment of the series, paleontologist Julia Clarke tells how birds evolved from dinosaurs. When the first Archaeopteryx fossil was discovered in a quarry in Germany in the early 1860s it created a lot of excitement. The discovery came only a few years after the publication of the Origin of Species by Charles Darwin. Since then dozens of Archeopteryx fossils […]

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  • Voyage of Darwin’s Beagle – Episode 1: One Small Step For Man (2009)

    Voyage of Darwin’s Beagle – Episode 1: One Small Step For Man (2009)

    February 12, 2015 at 12:39 am / Evolution, Human Nature, Video

    Beagle: In Darwin’s Wake is a commemoration of 150th anniversary of the publication of Darwin’s book “On The Origin of Species”. Almost 180 years after Charles Darwin’s journey circumnavigating the world, a crew of authors, artists, and scientists follow in his footsteps. Journalist and presenter Lex Runderkamp, biologists Dirk Draulans and Sarah Darwin (who is the great-great-granddaughter of Charles Darwin), the artist Anthony Smith and the writer Redmond O’Hanlon are accompanied by a number of invited guests whose backgrounds are […]

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  • Voyage of Darwin’s Beagle – Episode 2: Low Life on the Ladder of God (2009)

    Voyage of Darwin’s Beagle – Episode 2: Low Life on the Ladder of God (2009)

    February 12, 2015 at 12:37 am / Evolution, Human Nature, Natural history, Video

    When Darwin set foot in Rio de Janerio he witnessed the brutality of slavery. Brazil is a melting pot of genetic diversity. All fossil and genetic evidence points that Africa is the home continent where modern Humans originated about 200 thousand years ago. As Humans spread and colonized new continents genetic diversity eroded gradually proportional to the distance away from Africa. Loss of genetic diversity was because of joint effects of two well understood genetic phenomena known as population bottleneck […]

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  • Voyage of Darwin’s Beagle – Episode 3: The Last Frontier (2009)

    Voyage of Darwin’s Beagle – Episode 3: The Last Frontier (2009)

    February 12, 2015 at 12:34 am / Ecological Documentaries, Evolution, Human Nature, Video

    Fish are cold blooded animals and this property make them very efficient in terms of biomass accumulation. For this reason ecological trophic levels in aquatic systems can be much higher than terrestrial systems. The documentary film The End of the Line by Charles Clover mentioned in this episode draws attention to the problem of overfishing. About 400 million years ago, the Falkland Islands were part of the supercontinent of Gondwana, located between southern Africa and what is now Queen Maud […]

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  • Voyage of Darwin’s Beagle – Episode 4: The Final Countdown (2009)

    Voyage of Darwin’s Beagle – Episode 4: The Final Countdown (2009)

    February 12, 2015 at 12:31 am / Ecological Documentaries, Evolution, Global Patterns, Human Nature, Video

    “In the wake of Beagle” series brings back the adventure/science mix documentary programs reminiscent of those of Cousteau. Expeditions carried out on a ship and underwater filming was a signature in Cousteau’s filmmaking. This episode prepares the audience for the next episode filmed in the Galapagos Islands. Darwin developed his insight towards evolving species in that volcanic archipelago. Galapagos islands are largely affected by long-term seasonal fluctuations that known as El Nino/La Nina cycle. A few events Darwin witnessed in […]

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  • Voyage of Darwin’s Beagle – Episode 5: The Paradise of Competition (2009)

    Voyage of Darwin’s Beagle – Episode 5: The Paradise of Competition (2009)

    February 12, 2015 at 12:27 am / Ecological Documentaries, Evolution, Global Patterns, Natural history, Video

    The Galapagos islands has been a pivotal single location where everything came together in Darwin’s mind. The geology of the archipelago and almost every species (Tortoises, iguanas, finches) he observed on each island showed significant variation. The Galapagos Islands, which are part of Ecuador are about 1000 km (620 miles) west of South America. As the three craters on the largest island (Isabela Island) suggest, the archipelago was created by volcanic eruptions. Each year roughly 60,000 tourists visit these islands. […]

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  • Voyage of Darwin’s Beagle – Episode 6: Toolbox of Survival (2009)

    Voyage of Darwin’s Beagle – Episode 6: Toolbox of Survival (2009)

    February 12, 2015 at 12:12 am / Ecological Documentaries, Evolution, Global Patterns, Human Nature, Video

    In Australia the arrival of Europeans profoundly effected the biology of the continent through introduction of non-native species that are reproducing and invading at an unprecedented rate. Australian biologists call it “extinction calamity” since the continent has lost one in ten of its native mammals species in the past 200 years. The effects of climate change is also evident with severe droughts and wild fires. A large fraction of Australian vegetation is serotinous that is adapted to disperse their seeds […]

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  • Voyage of Darwin’s Beagle – Episode 7: Adapt or Die! (2009)

    Voyage of Darwin’s Beagle – Episode 7: Adapt or Die! (2009)

    February 12, 2015 at 12:09 am / Evolution, Human Nature, Molecular Nature, Video

    In this leg of the journey in Australia the theme “On the Future of Species” dominates the episode. Darwin absolutely had no clue on how genetic information from parents were transmitted to the offspring and he was perfectly aware of his situation. On the other hand, while he was writing his book battling with hereditary questions, an Augustinian friar with a scientific mind was carrying out his experimental crosses in a monastery which was going to lay the foundations of […]

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  • Voyage of Darwin’s Beagle – Episode 8: The Ruins of Progress (2009)

    Voyage of Darwin’s Beagle – Episode 8: The Ruins of Progress (2009)

    February 12, 2015 at 12:07 am / Ecological Documentaries, Evolution, Global Patterns, Human Nature, Video

    In this last episode of the series the crew of Stad Amsterdam visits Mauritius island before making a final stop in South Africa where the journey of modern Human ancestors began 200 thousand years ago. San culture in South Africa is the most ancestral Human population finding Like many island ecosystems Mauritius has been impacted by introduced species such as macaques. Species evolved on island systems are more prone to extinction. The flightless bird the Dodo is the icon of […]

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  • Great Transitions: The Origin of Humans – Rob Whittlesey – HHMI (2014)

    Great Transitions: The Origin of Humans – Rob Whittlesey – HHMI (2014)

    February 11, 2015 at 11:25 pm / Evolution, Human Nature, Video

    What did the common ancestor of Humans and chimpanzees looked like? This is not something we can triangulate simply by looking at a modern chimpanzee and Human. All the evidence points that Africa is the home continent for primates. Paleontologists are working hard to find the fossils that help us understand the key stages in Human evolution. Molecular genetic analysis of modern Human and chimpanzee revealed a very high degree of similarity. Through DNA hybridization experiments it was estimated that […]

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  • The Origin of Tetrapods – Rob Whittlesey – HHMI BioInteractive (2014)

    The Origin of Tetrapods – Rob Whittlesey – HHMI BioInteractive (2014)

    January 30, 2015 at 3:13 pm / Evolution, Video

    The program takes us into the fascinating saga of discovery of the tetrapods that explains how limbs of the terrestrial vertebrates came to be. Watch how the legendary 375 million year old Devonian tetrapod fossil Tiktaalik was discovered after a series of adventurous Arctic expeditions. Tiktaalik means “Little fish in water” in Netsilik Inuit language. Neil Shubin provides a first-hand account of the search for Tiktaalik and the evolution of four-legged animals. The limb structure in Tiktaalik appears as a […]

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  • Seed Dispersal Under the Threat of Mustard Bomb – Michal Samuni-Blank (2012)

    Seed Dispersal Under the Threat of Mustard Bomb – Michal Samuni-Blank (2012)

    January 27, 2015 at 11:35 am / Ecological Documentaries, Evolution, Natural history, Video

    Plants evolved diverse ways to disperse their seeds using animals. To give a few specific examples Long-wattled umbrella birds, Toucans and fruit eating bats are known for effective dispersal of palm tree seeds by eating the fruits. These dispersers regurgitate or defecate seeds after flying far away. On the other hand, most fruit eaters are also seed predators. Unlike birds and bats other animals such as agoutis, monkeys, peccaries and tapirs can chew and destroy the very same palm seeds. […]

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