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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)

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)

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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The Making of a Theory: Darwin, Wallace, and Natural Selection – John Rubin – HHMI (2014)

January 20, 2015 at 2:36 pm / Evolution, Video

This documentary does it right. The theory of evolution was co-discovered independently by two biologists that lived within the same time period. Darwin and Wallace were well known in their time but Wallace’s name gradually has been overshadowed by Darwin. Today we rarely (almost never) hear the name Alfred Russell Wallace. This documentary does a good job to revive Wallace’s name. Wallace was quite an impressive personality and his life most certainly was inspirational. He knew what “survival” really meant. […]

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The Forgotten Voyage: Alfred Russel Wallace and His Discovery of Evolution by Natural Selection – Peter Crawford (1983)

January 20, 2015 at 2:33 pm / Evolution, Video

The theory of evolution was co-discovered independently by two biologists that lived within the same time period. Darwin and Wallace were well known in their time but Wallace’s name gradually has been overshadowed by Darwin. Today we rarely (almost never) hear the name Alfred Russell Wallace. In this documentary Peter Crawford directs a dramatization of the events showing the interaction between the two influential scientist. We see Wallace as a determined resilient young naturalist without formal education build a respectable […]

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The Ladder of Creation – Jacob Bronowski – BBC (1973)

January 20, 2015 at 2:33 pm / BBC documentaries, Evolution, Video

The theory of evolution was co-discovered independently by two biologists that lived within the same time period. Darwin and Wallace were well known in their time but Wallace’s name gradually has been overshadowed by Darwin. Today we rarely (almost never) hear the name Alfred Russell Wallace. In this documentary Jacob Bronowski makes a rare attempt to focus on the biography of this very influential scientist. He tells Wallace’s story beginning from the early years of his childhood. We see a […]

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A Phorid Parasitoid Fly Attacking Carpenter Ants Tending Aphids

January 9, 2015 at 2:19 pm / Ecological Documentaries, Evolution, Natural history, NatureDocumentaries.org, Short Observations, Video

Recorded at the Georgia State Botanical Garden of Athens, GA on August 17th 2014. A carpenter ant (Camponotus spp.) colony nested at the base of a young beech tree (Fagus grandifolia) were tending aphids on the same tree. There is an interestic four level trophic interaction at this one spot forming a food chain. The parasitoid fly feeding on ants who feed on aphids sucking carbohydrate rich sap out of the beech tree: Beech tree > Aphids > Ants > […]

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Hawaiian Honeycreepers: Evolution in Hawaii

December 5, 2014 at 11:36 pm / Ecological Documentaries, Evolution, Natural history, Video, Wildlife Documentaries

Untamed Science is a science video blog. In this episode the focus is on the evolution of Hawaiian honeycreepers and the geology of the archipelago. The documentary does an excellent job in describing the formation of the volcanic island chain with a brief animation showing the crossection of the Earth’s crust and the hot molten mantel. In Hawai’i, honeycreepers and a group of plant species called lobeliads belonging to the bellflower family (Campanulaceae) evolved in an intricate interaction involving nectar […]

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Hawaiian ‘I’iwi Bird – The Nature Conservancy

December 5, 2014 at 11:35 pm / Ecological Documentaries, Evolution, Natural history, Short Observations, Video, Wildlife Documentaries

This short observation was recorded at The Nature Conservancy’s Waikamoi Preserve on Maui. It shows one of the classic examples of co-evolution between a plant and a bird. The long bill of the scarlet ‘i’iwi (Vestiaria coccinea) and the curved, tubular flower of the blue ‘ōpelu (Lobelia grayana), a native lobelia have evolved together due to selective forces that increase the survival success of both species. In Hawai’i, honeycreepers and lobeliads evolved in an intricate interaction involving nectar feeding pollination […]

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What Ants Teach Us? – Deborah Gordon TED Talk (2014)

November 4, 2014 at 2:05 pm / Ecological Documentaries, Evolution, Natural history, Video, Wildlife Documentaries

There’s never enough ant coverage in Nature Documentaries. Ants are a paradigm for self organizing systems. Here you can watch two TED lectures by the prominent ant scientist (Myrmecologist) Deborah Gordon of Stanford University. She has been studying red harvester ants intensely both in the field and in laboratory. Observation of ants in both environments have been very informative in understanding emergent properties of a complex system such as an ant colony. How does a living system with no central […]

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Ants in Space – Stanford University – BioEdOnline.org

November 4, 2014 at 2:05 pm / Evolution, Natural history, Video

Teachers! Students! A new citizen science project needs your help! You can help scientists collect data by repeating an experiment that was carried out in space. In January 2014 live colonies of pavement ants (Tetramorium caespitum) were taken to the International Space Station for a curious experiment. The experiment sought to understand whether worker ants change their search behavior in microgravity? The experimental set up was designed by Dr. Deborah Gordon in collaboration with Baylor College of Medicine Center for […]

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Red Eyed Green Frogs Mating (2002)

November 4, 2014 at 8:48 am / Ecological Documentaries, Evolution, Natural history, NatureDocumentaries.org, Short Observations, Video, Wildlife Documentaries

Red eyed green frog (Agalycnis callidryas) mating is an event visible to few visitors of the Neotropical forests. These frogs live high up in the forest canopy and only come down to swamps to breed in large numbers. The economy of nature limits reproductive effort of females. Egg production is costly compared to sperm therefore not all females can be ready to mate when the mating time comes. There’s always less females in a given mating aggregation and males put […]

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Chromosome Evolution in Plants

September 21, 2014 at 3:27 pm / Evolution, Molecular Nature, Video

Accidents happen all the time and sometimes living cells fail to divide properly. During cell division the genetic material that was supposed to be distributed equally between two cells may all stay in one of the cells. If this happens in body cells a cancerous tumor may develop or the cell may die. If it happens in an embryo at the very early stages of development at rare occasions these individuals may survive to maturity and may even reproduce to […]

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RNA Interference (RNAi) – Nature Reviews Genetics

June 25, 2014 at 10:06 am / Evolution, Molecular Nature, Video

Welcome to another post of Molecular Nature series highlighting a gene silencing mechanism known as RNA interference. The discovery was made by Craig Mello and Andrew Fire who shared 2006 Nobel Prize in Physiology and Medicine. Please keep in mind that this video is quite advanced in content and assumes the viewers know about basic molecular biological concepts such as the Central Dogma of Biology. RNA interference (RNAi) is a process used by wide range of organisms to regulate the […]

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The Hidden Life of the Cell – BBC (2012)

May 16, 2014 at 11:33 pm / BBC documentaries, Evolution, Human Nature, Molecular Nature, Video

Ebola virus is threatening to spread out of Africa. Zika virus is evolving and circulating in more than 50 countries. At this stage we must inform ourselves and others about viruses. The Hidden Life of the Cell does just that by illustrating a real scenario of adenovirus infection and while doing that introduces major cellular components. The documentary is quite successful in explaining the biology behind events. However, you might also want to see Inner Life of Cell and the […]

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