1269
(1 vote, average 5.00 out of 5)
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Science
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Life has evolved into a multitude of sizes. Over the course of three billion years, life has taken on many forms–from an .02-micrometer-long bacteria to the 110-foot-long blue whale. Scientists are learning how the struggle for survival has led some animals to become small and others to get huge. Understanding the evolution of size tells us why giant dinosaurs went extinct while the first tiny mammals thrived; gives us answers to why mammoths evolved into pygmies when restricted to islands;
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1268
(1 vote, average 5.00 out of 5)
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Science
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Nobel Prize winner Sir Paul Nurse examines why science appears to be under attack, and why public trust in key scientific theories has been eroded – from the theory that man-made climate change is warming our planet, to the safety of GM food, or that HIV causes AIDS.
He interviews scientists and campaigners from both sides of the climate change debate, and travels to New York to meet Tony, who has HIV but doesn’t believe that that the virus is responsible for AIDS.
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1263
(2 votes, average 5.00 out of 5)
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Science
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The Moon is such a familiar presence in the sky that most of us take it for granted.
But what if it wasn’t where it is now? How would that affect life on Earth? Space scientist and lunar fanatic Dr Maggie Aderin-Pocock explores our intimate relationship with the Moon.
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Science
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Sahelanthropus Tchadensis is one of the oldest known species on the human family tree. This species lived sometime between 7 and 6 million years ago in West-Central Africa (Chad). Walking upright may have helped this species survive in the diverse habitats – including forests and grasslands.
Though we only have cranial material from Sahelanthropus, studies so far indicates this early human had a combination of apelike and humanlike features.
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Science
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Forty years ago, American anthropologist Doctor Ralph Selecki explored the caves at Shanidar where he unearthed an image of ancient man that profoundly changed the way we saw our ancestors.
The professor discovered a skull – a Neanderthal skull. Strangely, it was covered with microscopic pollen from the flowers of thistle, groundsel, spiraea and hollyhock, among others.
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1254
(1 vote, average 5.00 out of 5)
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Science
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Deoxyribonucleic acid, or DNA, is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms (with the exception of RNA viruses).
The main role of DNA molecules is the long-term storage of information. DNA is often compared to a set of blueprints, like a recipe or a code, since it contains the instructions needed to construct other components of cells, such as proteins and RNA molecules.
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1253
(2 votes, average 4.50 out of 5)
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Science
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This relatively obscure series (2002) is a real find. 7 hour long episodes tell the story of primarily invertebrates of the sea (sponges, anemones, flatworms, molluscs, arthropods, jellyfish, sea stars, etc…) over the course of time and how we relate and in some cases depend on these seemingly lowly creatures.
Amazing video footage and computer graphics clearly explain everything. The scope of the video is worldwide. This is documentary film-making at its best.
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