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The last decade of the 20th Century sets us on course for the next 100 years. With inventions like Global Positioning Satellites and The Hubble Space Telescope, the inventions of the 1990s help us see where we've been and where we're going. Additional inventions include: the wind up radio, camera phone, the Mars Pathfinder, and the neurotropic electrode.
(Source: DCMP)
About every two years, Earth and Mars wind up on opposite sides of the sun, which can block the signals sent by the rover. During this solar conjunction, scientists must ensure they do not lose any of the data being sent by “Curiosity.” Part of the “Mars in a Minute” series.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, soaring over the desert, Moko and Totemie finally see the blue expanse of the ocean. Then a string of tiny islands covered in green and white. Fascinated by the view, they don't notice the wind picking up. As the wind gets stronger it shakes their kite and Totemie lets go, and Moko lets go as well so she won't fall alone. They fall into the water in a beautiful lagoon which they discover together, their courage rewarded.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, having made their way beyond the great valley, Moko and Totemie discover a blanket of white stretching out in front of them. An old man tells them that once they get to the other side they will see what so many others have dreamt of seeing, but that they must fly like birds. He offers them a strange kite. As the wind picks up, they hang on tight and fly off from the salt pan.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Mei-Lei takes Moko to the rice fields. The sky is blue and Moko thinks that in this country there just aren't any clouds. Mei-Lei tells him to wait until nightfall, that the rains will dance over the village. Moko doesn't believe her, there isn't a cloud in sight! Suddenly, the sky darkens and Mei-Lei wants to return to the village, but Moko wants to know more. He climbs the hill behind the village to get a better look at the sky. The wind picks up and a great wave of rain washes everything in its wake. Moko and Mei-Lei take shelter from the monsoon behind a rock. To make the rain stop Mei-Lei starts to sing and dance. Bit by bit the rain subsides and the two friends decide to return to the village. Moko thinks that Mei-Lei's dancing was magical and had the power to stop the rain.
Did you know Oregon crab fishers lose their pots because they often encounter high winds and waves up to 40 feet? Join Joel on this adventurous quest as he boards a vessel to sail the Oregon coast in search of crab pots in an effort to help clean up the ocean. Part of the Curiosity Quest Series.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, one morning, Alarick and Moko head into the sea to go fishing. They take a small boat and anchor in the shadow of a great boulder of ice to protect them from the wind. When they wake up they don't recognize their surroundings. The iceberg is drifting along the waves and is dragging their boat along with it. Moko is confident the ocean is showing them where there will be more fish for them to bring back to the village.
Turn light source on to explore. Observe what happens in the observation window as you set up different combinations of light source and molecule. Note this simulation is the first to support our zoom and magnification feature, so zoom in for a closer look, if you need to.
(Source: PhET Interactive Simulations)
Earth's moon was probably formed when a body the size of Mars collided twice with the planet. The moon is steadily receding into space; eventually, due to the loss of this lunar regulator, Earth will start to wobble, creating climatic chaos. Eclipses can be also seen often when the sun obscures the moon or vice versa. Another light show, the Aurora, occurs when electrified particles from the solar wind interact with Earth's upper atmosphere and is visible particularly in the Polar Regions.
Today, people send emails, text messages, and status updates instantaneously. But not so long ago, messages were handwritten and travelled no faster than people could carry them. With the invention of the telegraph and then the telephone, instant communication was born. Radio and television created an industry for mass entertainment that continues to grow, and the computer age changed how data is crunched. With the invention of the internet in the 1980s, the world of communication has truly shrunk.
Space weather can have important consequences for everyday life, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation. The United States Geological Survey (USGS) Geomagnetism Program monitors variations in the Earth's magnetic field through a network of 14 ground-based observatories around the United States and its territories, providing data in real-time to a variety of customers.
What is the best way to power the planet? Travel the globe with scholar Johan Norberg, from Morocco to Sweden and throughout the United States, as he explores the pros and cons of the eight main energy sources available to us: coal, oil, natural gas, nuclear, hydro, biomass, wind, and solar.
Scientists have long chalked up ocean mixing of salt, heat, nutrients, and gases, such as oxygen and carbon dioxide, to wind and tides. New research is investigating another possible contributor: krill. Mixing ocean water may seem like a big job for such a tiny creature, but krill are a force of nature when they migrate in giant swarms to feed at night. Part of the "Science Nation" series.
Every year, hundreds of millions of people voluntarily turn their lives upside down by setting their clocks forward one hour in the spring and back one hour in the autumn. This is mandated by the government and varies depending on where one lives. However, individuals are beginning to ask if the supposed advantages for springing forward and falling back still hold up? Part of the “It’s Okay to Be Smart” series.
It is Fletcher's first autumn, and he is alarmed when the leaves on his favorite tree start to turn brown and fall off. He tries day after day to save the leaves that the tree is losing to the wind. When the tree has no leaves left, Fletcher goes to bed in despair. However, after a cold night, Fletcher wakes up to see his tree sparkling as he has never seen it before. Based on the children's book by Julia Rawlinson.
At the Body Farm, the dead speak. Follows the world's first open-air crime lab with founder Bill Bass, of The University of Tennessee, for a close-up look at how cadavers decay. As proxies for murder victims, these decomposing bodies are studied in the name of science and the cause of justice. Talks about the factors and biological markers that help pinpoint time since death, including wind and weather, insects and carnivores, fire damage, soft tissue leachate, mold, and bacteria. Presents three homicide cases that hinged on data and expertise gained at the Farm, and shows Ph.D. students using forensic science and body processing. Shows human bodies in a variety of decomposition stages.
Fossils are windows to the past. This program takes a look at how fossils are formed and preserved. Special attention is given to the meaning, significance, and use of fossils in telling about past life on Earth.
On the windswept tarmac of the former Alameda Naval Air Station, an inventive group of scientists and engineers are test-flying a kite-like tethered wing that may someday help revolutionize clean energy. Students explore the potential of wind energy and new airborne wind turbines designed to harness the stronger and more consistent winds found at higher altitudes.
Wind is a natural resource that is readily available and virtually everywhere. Humans have been harnessing the power of the wind for around 2,000 years. The Dutch made the windmill famous. Defines the process of turning the kinetic energy of the wind into electrical energy. Shows how the large wind turbines are built using a simplistic design and modern technology. Explores how the use of wind power is growing and becoming widely used throughout the world.
Kathryn Johnson, an electrical engineer at the Colorado School of Mines, studies large utility-scale wind turbines. Kathryn’s research aims to make the turbines more efficient in order to capture as much of the wind’s energy as possible. Viewers also visit NSF’s National Center for Atmospheric Research, where scientists are working with local utility companies to create an advanced wind energy prediction system. Using data from sensors mounted on each turbine, the system generates a forecast specific to each turbine on a wind farm. This helps the utility company provide as much energy as possible from clean sources.
Showing collections 1 to 7 of 7
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
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
Collection of anatomy resources
A collection containing 21 resources, curated by Benetech
Biology related concepts
A collection containing 59 resources, curated by Benetech
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
