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Volcanic ash is known to present hazards to aviation, infrastructure, agriculture, and human and animal health. Airborne ash coats the exteriors of aircraft, enters modern jet engines and melts while coating the interior parts thus causing damage and failure. With support from the National Science Foundation, Volcanologist Dork Sahagian and his colleagues are learning more about the aerodynamic properties of ash, and how long different sizes and shapes stay in the atmosphere. They use a wind tunnel to study how ash travels in the atmosphere during and after volcanic eruptions. They want to develop ways to predict when and for how long damaging ash will fill the skies, and when it’s safe to fly again.
(Source: DCMP)
Rip currents account for 80% of beach rescues, and can be dangerous or deadly if swimmers don't know what to do. Before heading to the beach, one should check local beach forecasts and always swim near lifeguards. Beachgoers should also look for any warning signs or flags. If a swimmer happens to be caught in a rip current, stay calm. The most effective way to break from a rip current is to float. Part of the "Danger Zone" series.
David Stahle travels to ancient forests around the world, collecting tree rings to learn more about major climate and historical events dating back hundreds and thousands of years. With help from the National Science Foundation, he uses dendrochronology, or tree-ring dating, to get a snapshot of climate change over time. Stahle runs the Tree-ring Lab at the University of Arkansas, where he and fellow tree-ring researchers are learning that a trend of global warming began in the 1800s and continues today, brought about by changes in tropical sea surface temperatures of no more than a few tenths of a degree Celsius. Today Stahle is working with hydrologists and government planners in California and throughout Mexico to plan for drought and climate change events.
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, Moko crosses the plains of Siberia and gets his first taste of the cold. After having found shelter in a cave for the night, he wakes to find a carpet of snow stretching out over the landscape as far as his eyes can see. Amazed at first, Moko realizes that he can no longer see his path and find his way. Could he have found the end of the world where distracted travelers get lost? At which point he notices footprints leading to a village.
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. Moko and Totemie take a boat and travel across the lake to where the landscape is very different. Suddenly, they see a strange column twirling in the horizon. The wind is getting stronger and stronger all around them. Moko and Totemie find a tree and hang on to it as tightly as they can. The cyclone goes over their heads and they can see in the center of the column of wind. Moko thinks that if you respect the power of nature, then nature lets you see some of its secrets.
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, Moko tells himself that it is time to leave Mei-Lei's land and he gets his raft ready. A man tells him that he must take the route of the great plains to continue his journey. As he walks a great gust of wind makes him fall and drop his precious stone. Seeing it on the ground, Moko thinks of Mei-Li and tells himself he must go on for those he has left behind. Moko's heart lightens as he thinks that one day his travels will bring him back to those he loves.
The Standard Deviants explore volcanoes and what causes them to erupt. They also discuss lava, pyroclastic materials, and the Ring of Fire. Then, it's time for a discussion on weathering. Part of "The Rockin' World of Geology" series.
In this segment, students learn about the process of weathering. It is the breaking down of rocks, soil, and minerals through contact with the earth's atmosphere, water, and biological organisms. Other topics covered include erosion, surface water, groundwater, wind, and waves. Part of the "Earth Science" 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, Moko and Alarick are heading back towards the village, their boat filled with fish. They moor their boat and start walking in the direction of the village. As they round the mountain they finally see the rooftops of the approaching village. Moko yells out in joy. Suddenly, a cloud of snow appears to be tumbling down the mountain like a galloping horse. Alarick and Moko take shelter under a large boulder. As the avalanche hits with all of its fury, Alarick pleads with the mountain to forgive Moko for his outburst, and it is once again calm. Moko promises to be quiet from now on and thanks his friend for reasoning with the mountain.
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, Moko wonders why all the clouds come and cry over his village at the same time. What makes them so sad? He questions the wise old man of the village, who suggests that he wait till the end of the rainy season for the answer. Once the rains are over, Moko goes back to see the old man. The old man tells him that the answer lies in the fields and the crops. Moko sees that the rain has allowed so many things to grow, and that the village has all the food it needs. So he realizes that the clouds are not sad when it rains, but rather that they give all their water to fertilize the soil.
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, on that morning, Moko was helping his friend and the other villagers to cut firewood to heat their homes. Snow begins to fall, and Alarick tells Moko that it would be best if they went back inside. But Moko wants to learn the secret of the snow. He heads toward the mountain. At the summit, he sees large trees bending in the wind and clouds of snow swirling around in the sky. As he makes his way back down to the village, the storm blocks his way and he can go no further. Moko begs with the mountain to let him through, promising to tell no one the mountain's secret. The storm calms and Moko returns to the village. When Alarick asks him what he has learned, Moko tells him that the mountain's secret is not one that can be revealed.
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.
