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First in a three-part series exploring the history of race perceptions and behaviors towards races in the United States. Explores how recent scientific discoveries have toppled the concept of biological race. Follows a dozen high school students who sequence and compare their own mitochondrial DNA looking for a "race marker," with surprising results. Also looks at the history of racism in the United States, the advent of stereotypes based on physical attributes attributed to races, and somatotypes, with particular reference to African Americans.
(Source: DCMP)
Hanna and Olli race to get to a distant island. They have a choice between a motorboat and a sailboat. Hanna chooses the motorboat and leaves Olli with the sailboat. Who will win the race? They both learn important lessons about energy and natural resources. Part of the "My Little Planet" series.
Dorothy Vaughan, Mary Jackson, Katherine Johnson, and Christine Darden were good at math. They participated in some of NASA's greatest successes, like providing the calculations for America's first journeys into space. This title explores the story of four female African-American mathematicians as they overcame gender and racial barriers to succeed in a highly challenging career. Based on the children's book by Margot Lee Shetterly.
For optimal performance, all the components of a race care must be balanced. Getting the right balance is hard because the weight of the fuel changes and the tires wear during the race. Crew chiefs make sure the cars are ready to race through the application of scientific principles. Part of "The Science of Speed" series.
It takes more than ten thousand pounds of force to get a race car around the turns of the race track. The tires are essential in distributing this force and keeping the car on the track and out of the wall. Part of "The Science of Speed" series.
The parakeet starts with a monologue about games and sports. The first guest, the turtle is very concerned that the tradition of the annual race of the turtle and the hare, or hare relatives, may be lost if the race is not done this year. The rabbit doesn't want to race because last year he lost, and the turtle rubbed on his face the whole year. The fleas present a documentary about how important it is for humans to win. The celebrity guest, a tropical pop singer who likes flowers, tells us how he felt every time he was nominated for an award winning musical but didn't win.
Race cars are loud. They don't have mufflers because mufflers will reduce the speed of the car. Spectators need to make sure they have adequate ear protection if they attend a NASCAR race. Part of "The Science of Speed" series.
Grip is the frictional force that holds the tires on the track, and NASCAR mechanics are always looking for ways to increase the grip of tires. The cars have less grip as their speed increases, and mechanics must understand the relationship between speed and grip to ensure the race car is able to perform safely at high rates of speed. Part of "The Science of Speed" series.
What is the future of human presence in space? How might things be different if there had not been a Cold War and a Space Race? What does humanity gain by venturing into the solar system? Three events are key moments in the conquest of space: the R-7 rocket launches the first satellite into space, President Kennedy's speech announces the United States race to the moon, and Neil Armstrong walks on the moon. Part of the "Butterfly Effect" series.
The marine reptiles Ichthyosaurs arose after the Great Dying, which wiped out at least 90 percent of life in the oceans. This event changed the seas forever and triggered a new evolutionary arms race between predator and prey. Part of the “Eons” series.
A woman with osteoporosis shares her experience, how she copes, and steps she's taken to prevent further bone loss. Physicians explain the disease, the risks and statistics, and the importance of calcium, exercise, and vitamin D earlier in life. Demonstrates a bone density test.
From cyclists to race cars, the motion of an object is determined by the sum of the forces acting on it. An aeronautics engineer works with Newton's three laws of motion to test the best bicycle posture and helmet in a wind tunnel.
The engine's job is to convert the energy in fuel to speed. With the application of scientific principles, NASCAR mechanics have discovered ways to quickly and efficiently get the race cars the speed they need to compete. Part of "The Science of Speed" series.
What's the difference between a venom and a poison? Host Emily Graslie highlights some cool reptiles and amphibians and discusses how they use their natural toxins to stay ahead in the evolutionary arms race. Part of "The Brain Scoop" series.
Speed, elegance, comfort, and many other factors are taken into account when creating a car. Car designers must be intentional in the creation of a great vehicle and ensure that all parts work together. Sports cars must have powerful engines, excellent chassis, strong suspension systems, and fuel efficient systems. Automotive technology ensures that consumers get more than just a pretty car.
NASCAR tires are filled with nitrogen to help protect against heat caused by friction. Friction also increases the air pressure in tires, and NASCAR drivers don't want a tire to blowout during a race. The use of nitrogen helps the crew predict how hot the tires will get. Part of "The Science of Speed" series.
Dr. Chris climbs to new heights in search of Canada’s perfect view. Then, he dives in and swims with grey nurse sharks. Next, he gets a mud bath courtesy of a baby rhino and searches for the elusive platypus. Finally, he gives it everything he’s got to compete in a tropical race. Part of "The Open Road With Dr. Chris" series.
Looks at how the male and female bodies are prepared for their task of continuing the human race. Shows the characteristics of sperm and ova and how each contains a partial blueprint for the future offspring. The mechanism of cell division is shown through exceptional microphotography, and the mechanisms of heredity are carefully described. NOTE: Shows some nudity.
In 2008, NASCAR driver Michael McDowell lost control of his car and hit the wall at 170 mph. Fortunately, McDowell was able to walk away from the accident, which is a testament to the safety elements NASCAR has instituted. NASCAR officials apply the scientific principle of the conservation of energy to strengthen their safety measures. Part of "The Science of Speed" series.
Peter Pritchard has seen each of the world's 300 species of turtles, but has a real affinity for the giant leatherback sea turtles on a Guyana beach. His conservation efforts with a local community insure that children learn about the turtles' habitats, behaviors, and characteristics. Watch a turtle lay her eggs and see the newly hatched babies race for the sea. Gives additional pertinent facts about this ancient species.
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