Posts by Uzay Sezen | Nature Documentaries

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Chasing El Niño – Carol L. Fleisher – PBS NOVA (1998)

August 13, 2015 at 9:42 am / Ecological Documentaries, Global Patterns, Nova Documentaries, PBS Nature, Video

Can we predict El Niño? Moreover can we calculate it’s severity and effects on different parts of the world? On board the research ship Ka’imimoana scientists carry out measurements and then build computer models to understand the climate cycle that produces El Niño. The documentary “Chasing El Niño” was released by the aftermath of an intense El Niño event observed during 1997/1998 measured. In March 2015 climatologists have started to detect early signs of another one beginning to develop. They […]

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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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Before Mars – Novo Mundo (Episode I) – National Geographic (2016)

June 14, 2015 at 9:40 am / Human Nature, Video

A defining feature of Human nature is exploration. We are hard wired with curiosity. It instinctively drives us to wonder what is behind the next hill. On planetary scale the Moon and the Mars are the nearest objects of interest in this endeavor. In this half-dramatized docu-feature film the National Geographic is aiming to inspire explorers that will colonize Mars. The mini-series takes place both in the future and in the present day. Episodes include interviews with influential people in […]

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Red Goat Moth (Cossus cossus) Caterpillar Searching for Pupation Site

May 16, 2015 at 4:28 am / Ecological Documentaries, Natural history, NatureDocumentaries.org, Short Observations, Video

Recorded on May 4th 2015 at the Atatürk Arboretum of Istanbul University, Bahçeköy, Türkiye. The individual in the recording most probably belongs to Cossus cossus gueruenensis reported from Asia Minor. The caterpillar has reached its final growth stage as a caterpillar and is frantically searching for a place to burrow itself in the forest floor to become a pupa. Pupation is the final stage of a caterpillar before metamorphosing into adult butterfly form. The developmental transformation in these insects has […]

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European Yellow Jacket Wasp vs. Australian Bull Ant (and other ant-wasp clashes)

April 23, 2015 at 9:26 pm / Ecological Documentaries, Natural history, Short Observations, Video, Wildlife Documentaries

Ant – Wasp clash is a rather frequent interspecific competitive interaction between the two social insect groups. At first glance wasps may seem to be at an advantage by being aerial. On the other hand, ants can achieve high numbers and squirt formic acid which is a potent neurotoxin for most animals. Wasps and ants both can bite and sting and therefore they are somehow equal rivals. The main footage featured above was filmed in the Kosciuszko National Park of […]

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High-speed Filming of Hummingbirds – Harold Eugene “Doc” Edgerton (1936)

April 12, 2015 at 10:38 am / Ecological Documentaries, Natural history, Video, Wildlife Documentaries

Harold Eugene “Doc” Edgerton (1903 – 1990) was a professor of electrical engineering at MIT. He invented the stroboscopic electric flash to capture events happening at incredible speeds including the explosion of an atomic bomb. Even in today’s standards these images are hard to capture. His uncle was pivotal in beginning of his innovation filled career. He introduced him to the world of cameras. Edgerton invented and developed many different cameras including underwater cameras. One of his cameras was tested […]

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Whale Shark Aggregation in Belize – Cristiana & Alain Bontemps (2009)

March 31, 2015 at 8:28 pm / Ecological Documentaries, Natural history, Video, Wildlife Documentaries

External fertilization is a wasteful process but still enables survival of many aquatic species. For external fertilization to be successful certain prerequisites are needed: high population numbers, aggregation of these large groups and synchronous release of gametes. Animals are great resource maximizers. Once they discover a high value resource they will exploit it as efficiently as possible. Gametes (sperms and eggs) released during external fertilization of large groups of fish such as the Jack are extremely nutritious for filter feeders […]

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Rapid Worker Recruitment in Aphaenogaster Ants

March 27, 2015 at 12:43 pm / Natural history, NatureDocumentaries.org, Short Observations, Video, Wildlife Documentaries

In this short observation a single worker drags a yellow jacket wasp (Vespula spp.) until a point close to the nest and then switches to a different task. She leaves to recruit more workers as a scout. Until the first recruits arrive two other workers tend the prey. The location of the prey must have been close to the nest because a third worker joins them 55 seconds after the scout leaves. Based on the time stamp of the unedited […]

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Spider Mom – Alvaro Mendoza (2012)

March 26, 2015 at 3:51 pm / Natural history, Short Observations, Video, Wildlife Documentaries

Egg laying by a female spider filmed by Alvaro Mendoza. Highly choreographed light use makes this short observation particularly striking. Spiders reproduce sexually. Fertilization is internal but the sperm is not inserted into the female’s body by the male’s genitals. Unlike many land-living arthropods, male spiders do not produce ready-made spermatophores (packages of sperm). Males spin small sperm webs on to which they ejaculate and then transfer the sperm to syringe-like structures on the tips of their pedipalps. Image source: […]

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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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The Antikythera Mechanism: The Two-Thousand-Year-Old Computer – Mike Beckham (2012)

March 21, 2015 at 7:51 pm / BBC documentaries, Human Nature, Video

Antikythera Mechanism is one of the best demonstrations of human intellect attempting to understand nature systematically. The contraption is most certainly a very complex device. It is an impressively accurate “analog model” of our then earth-centric universe. Science gives us prediction power and Antikythera Mechanism is an excellent example for how astronomical observations can be defined mathematically to reconcile lunar and solar calendars and predict eclipses with hourly accuracy using 27 gear pieces. It uses the Metonic Cyle first implemented […]

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Crossection of a Dandelion Compound Flower – Rüdiger Hartmann (2015)

March 8, 2015 at 11:30 am / Natural history, Short Observations, Video, Wildlife Documentaries

Dandelion (Taraxacum officinale) is one of the most ubiquitous plants belonging to the family Asteraceae. The plant is native to Eurasia but has become naturalized to all temperate regions of the World introduced unintentionally by Humans. It’s compound flowers are self-pollinated and seeds are wind dispersed. In this short observation developmental biologist Dr. Rüdiger Hartmann of the University of Freiburg has done a wonderful job of showing the dynamics of the mature compound flowers (inflorescence) using timelapse videography in his […]

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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)

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)

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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