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Host Emily Graslie discusses a new scientific theory about mammalian diversification. According to this new theory, placental mammals evolved before a major mass extinction event, which occurred sixty-five million years ago. However, there is no fossil record to prove the new theory, but scientists around the world used genetic material to form their theory. Part of "The Brain Scoop" series.
(Source: DCMP)
Two young narrators talk about dolphins, those mammals of the sea. Addresses their physical characteristics and method of communication. Shows where they live, what they eat, and how they play. Notes that the pink dolphin is a rare fresh water dolphin. Reminds the viewer that keeping the environment clean and recycling trash are two methods of protecting this familiar animal.
There's been a lot of talk and research interest around the possibility of resurrecting certain groups of organisms from extinction. In this episode, host Emily Graslie discusses this possibility with a focus on the woolly mammoth and the mastodon. Part of "The Brain Scoop" series.
Part of the "A 3-D Demonstration" series. Presents both the theory of electric circuits and basic practical methods of managing circuits safely. Investigates the benefits and dangers of ground circuits together with safety devices, such as fuses and ground fault interrupters. Introduces the concept of electric resistance. Specific modules include Completing a Circuit, Fuses, Circuit Breakers, Ground Circuits, Ground Faults, Ground Fault Interrupters, Resistance, and Electrical Resistance. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).
The second in a series of documentaries is built around a custom that is thousands of years old: fishing. At present, about 65 million people in the Greater Mekong live directly from the fish the river has to offer. Fishing methods are of course different according to places and ethnic groups. Additionally, modern times strongly challenge the fishermen in the Greater Mekong. Torn between tradition and modernity, these men and women have to make for themselves, and their families, decisions about new ways of life. Climate change and pollution add to the problem of a painful adaptation to a new way of life. Series: The Soul of Southeast Asia
Investigates the reasons why cattle and humans have been linked together for over 30,000 years. Analyzes the anatomy of the cow's stomach, detailing the purpose of each chamber. Visit the Masai with their cattle herds and the sacred cows of India. Introduces the main cattle breed of the 800 breeds developed in England, explaining how artificial selection is used to produce desirable characteristics. Also introduces British dairy cow detailing the working of the udder and teats and the use of genetic engineering to increase milk production. Interviews Eric Schlosser, an author about the development of slaughterhouse methods in America. Also visits a family ranch where cattle are being raised in natural conditions under a grass management system.
A great deal of today's modern technology exists due to the extensive use of the abundant chemical element, Silicon. California's Silicon Valley is where we find several of the world's most innovative and successful technology companies that touch all areas of human needs. Two of these companies, SunTech and Complete Genomics, are on the forefront of the innovative use of computing technology. Through their groundbreaking methods and designs they have harnessed the computing power of the Silicon Valley and applied it to creating more efficient and effective solar power generators as well as cost effective and highly accurate human genome mapping techniques.
In the Pacific Northwest, people are stripping moss for the horticultural trade at such an alarming rate that it's now illegal to harvest it. Ecologist Nalini Nadkarni knows that moss is a key component to the eco-system of the region, which makes it important to study. But this globe-trotting scientist at The Evergreen State College needed a lot of help recording research data from some folks who have much more time than she does. Where better to find potential research assistants with lots of time on their hands than the nearby medium security Cedar Creek Corrections Center? With support from the National Science Foundation, Nadkarni’s idea has been so successful that now the prisoners are starting bee keeping and composting programs, in addition to growing and recording data about moss.
With help from the National Science Foundation, Cornell University’s Ornithology Lab is tracking bird breeding biology and the impact of climate change on bird populations. Some of the best information they are getting is from dedicated “citizen scientists” who provide critical data on what kinds of birds are nesting where, the number of eggs laid, and the number of chicks hatched.
Hawaii's Kilauea volcano is one of the best places on Earth to study processes within basaltic volcanoes. Its high eruption frequency, easy access to lavas, and distinct geologic setting far from plate boundaries or continents allow researchers to address fundamental problems related to active volcanoes. Another constant at Kilauea, besides the flowing lava, has been University of Hawaii geologist Mike Garcia. With support from the National Science Foundation, Garcia has been leading studies of Kilauea for a generation, adding to the extensive knowledge base on this volcano. Two of the primary goals are to determine what has triggered Kilauea’s effusive, explosive cycles over the last 2200 years and when long eruptions, such as the current one, will stop. Part of the National Science Foundation Series “Science Nation.”
Harvard University, electrical engineers Rob Wood and Gu-Yeon Wei, and computer scientist Radhika Nagpal created the “RoboBee,” a miniature flying robot, inspired by the biology of a bee and the insect’s hive behavior. With support from the National Science Foundation and a program called Expeditions in Computing, Wood put together a diverse team of collaborators to get the RoboBee project off the ground. Ultimately, the researchers hope to build a colony in which the RoboBees interact, using their hive as a refueling station. They say RoboBees have the potential to be useful in a number of ways, including search and rescue missions, traffic monitoring, and weather mapping. Part of the National Science Foundation Series "Science Nation."
Since the time of the ancient Greeks, humans have been using spider silk to dress wounds. Scientists now know spider webs not only have healing qualities, they can be stronger than steel. University of Wyoming Molecular Biologist Randy Lewis adds an almost science fiction aspect to the study of spider silk: making large quantities of it by “growing it” in goat’s milk. With funding from the National Science Foundation, Lewis has cloned and sequenced genes for the proteins that make up five different spider silks, some stronger than Kevlar, others more elastic than nylon.
Stomach ulcers affect nearly four million American's every year. So, what causes them, and how are they treated? With funding from the National Science Foundation, researchers at Boston University are uncovering the mysteries of how H. pylori bacteria is able to survive and thrive in the acidic world of the human stomach.
These days it seems everything is going green including roofs. With funding from the National Science Foundation, Patricia Culligan of Columbia University is studying green roofs, from their effects on storm water runoff and carbon dioxide absorption to claims they impact local climate and save energy.
Scientists know that Earth’s climate has changed many times over billions of years and that Earth’s climate is always changing. Students will understand that climatologists are scientists that look for evidence from the past to help study climate change. This program also highlights the natural factors that affect climate change as well as the connection between the burning of fossil fuels and climate change. Part of the "Real World Science" series.
With support from the National Science Foundation, computer scientists at the University of Illinois at Chicago are pushing science fiction closer to reality. They have created a wraparound virtual world in which a researcher wearing 3D glasses can take a walk through a human brain, fly over the surface of Mars, and more. In the system, known as CAVE2, an 8-foot-high screen encircles the viewer 320 degrees. A panorama of images springs from display panels, conveying a sense of being able to touch what's not really there. Part of the National Science Foundation Series “Science Nation.”
It’s called a wavemaker, and its 300 feet long and 12 feet wide. With support from the National Science Foundation, this huge new tool, the largest of its type in the United States, is helping scientists perform large scale studies on the impact of both hurricane and tsunami waves.
Whether they arise from human causes or forces within planet Earth itself, natural disasters threaten life and civilization with what seems to be growing frequency. Studies troubling developments in marine, arctic, wetland, and urban environments while highlighting research opportunities that may help prevent future catastrophes. Coral reef decay, Everglades habitat loss, polar ice disappearance, and global warming are all analyzed. Looks at earthquake prediction, hurricane and tornado tracking, air pollution monitoring, tsunami warning systems, and the cleanup of toxic flood sediment in New Orleans.
One might never know it, but the seemingly quiet Harvard Forest in Massachusetts is actually hard at work. Like other forests, it’s busy doing some serious global housekeeping, which is being monitored by scientists at Harvard University. With support from the National Science Foundation, researchers are studying forest ecology. That research includes determining how the forest responds to carbon dioxide in the atmosphere. Part of the National Science Foundation Series “Science Nation.”
Queen Bees are not actually in charge of anything. Their job is to lay eggs, not to rule the hive. With support from the National Science Foundation, entomologist Gene Robinson and mechanical engineer Harry Dankowicz at the University of Illinois, Urbana-Champaign have teamed up with psychologist Whitney Tabor at the University of Connecticut to study how coordination emerges in leaderless complex societies, such as a bee hive. Part of the National Science Foundation Series “Science Nation.”
Showing collections 1 to 7 of 7
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
Biology related concepts
A collection containing 59 resources, curated by Benetech
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
Resources related to vision
A collection containing 12 resources, curated by Charles LaPierre
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
Collection of anatomy resources
A collection containing 21 resources, curated by Benetech
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
