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Host Alex Dainis discusses mitrochondrial DNA, which is the smallest circular chromosome found inside mitochondria. These organelles found in cells have often been called the powerhouse of the cell. The mitochondria, and thus mitochondrial DNA, are passed almost exclusively from mother to offspring through the egg cell.
(Source: DCMP)
A humorous film that poses fundamental questions about the origins of man. Tells the story of the hunt for Bigfoot (also called Sasquatch) by four men who have been tracking this mythical creature for the last 40 years. Reveals their hardships, history, and battles to bring Bigfoot out of the woods and into the real world. Includes eyewitness accounts of sightings. Intercut with monster-movie footage.
Gravity is the most powerful and exacting force in the universe. It binds us together, its reach hangs stars in the sky and its grip crushes light. Without gravity, stars, comets, moons, nebulae, and even the Earth itself would not exist. Explore how science and humanity discovered, overcame, and utilized gravity. Learn what it takes to propel objects into the heavens, to ride a wave, or to ski down a slope. Take a front row seat as an astronaut subjects himself to the weightless wonders of the specially modified aircraft used to train astronauts known as the "Vomit Comet."
Powerful forces have forged the conditions on Earth that have made life possible. The millennia have been witnesses to the formation of the planet: its singular position in relation to the sun, the evolution of the continents, and the birth of entire mountain chains. All of these elements combine to create Earth’s constantly changing climate. Homo sapiens emerge into this unpredictable and violent world, fighting for survival from the start. It is these early humans’ ability to adapt that allows them to triumph even in the face of incredible adversity and sets the path for modern man. Part of the "How Climate Made History" series.
This chapter provides a summary of the material discussed in the previous twelve chapters. Some of the topics reviewed include: the greenhouse effect, global warming, and climatic changes. This chapter also highlights the consequences associated with global warming from major cities to the rural country side. Viewers also explore ways to lessen the impact of global warming and how to adapt to the new climate conditions. Chapter 13 of Air: Climate Change Series.
Global warming is changing the intensity, duration, and frequency of precipitation. These changing climate patterns are altering the water cycle and negatively impacting the environment. As the climate of regions changes, life on earth is significantly impacted. The increased potential for flooding raises concerns over loss of life and property, and individual actions are critical to lessen global warming and climate change. Chapter 4 of Air: Climate Change Series.
The Hawaiian bobtail squid and its resident bacterium, Vibrio fischeri, have a powerful and still somewhat mysterious symbiotic relationship. The luminescent bacteria populate a small pouch on the squid’s underside called the light organ, and provide a sort of “Klingon cloaking device.” They produce light at night to offset the squid’s shadow and hide it from predators when it approaches the ocean’s surface to feed. At the University of Wisconsin-Madison, microbiologist Margaret McFall-Ngai studies this unusual relationship. An understanding of these creatures’ rhythms could lead to new ways to treat disease. She is also studying how the squid and bacteria communicate, so they don’t harm each other.
Vanderbilt University researchers say they're working to unleash an insect repellent on mosquitoes that’s more powerful than DEET. The discovery could one day be effective in reducing the spread of mosquito-borne diseases, such as malaria. It's based on a mosquito's sense of smell. With support from the National Science Foundation, Vanderbilt University biologist Laurence Zwiebel researched which mosquito genes are linked to odor reception. He discovered a separate odor sensor on a mosquito's antennae. According to Zwiebel, mosquitoes use odor sensors to sniff out humans and other tasty animals to bite. The new insect repellent compound takes advantage of his discovery by overwhelming the mosquito’s odor sensors to the point that they can't smell anything else and get scared away.
The freezing and melting of water affects so much of the world. Ice crystals in thunderclouds create lightning. It is also powerful enough to crack boulders, float stones, and alter entire landscapes. Ice is a common substance, but it has some secrets and weird properties scientists have only just begun to understand. Part of the "It's Okay to Be Smart" series.
Visionary oceanographer Scott Glenn leads a team of scientists as they race against time to launch the first autonomous underwater robot across the vast and dangerous Atlantic Ocean. Destined for Spain, the 8-foot bright yellow robot named RU27, or "Scarlet," is launched off the coast of New Jersey. Throughout her journey, data collected by Scarlet is fed into oceanographic navigation and forecasting models. Engulfed by the powerful ocean, our robot hero faces extreme weather conditions, ship traffic, and aggressive sea life that can terminate her mission. If Scarlet can successfully cross the vast Atlantic Ocean, her historic mission will inspire a future robotic oceanographic observation network critical for monitoring and predicting climate change. If Scarlet can successfully cross the vast Atlantic Ocean, her historic mission will inspire a future robotic oceanographic observation network critical for monitoring and predicting climate change.
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A collection of Chemistry related resources
A collection containing 67 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
