Tag Archives: nature

Caffeine 101 | National Geographic

(light liquid pouring) (gentle sipping) – [Narrator] For morning coffee to afternoon tea, caffeine is so thoroughly entrenched in our daily routines and has become the worlds most widely used psychoactive substance. Caffeine is a chemical compound that stimulate the central nervous system. It accomplishes this by attaching itself to adenosine receptors in the brain.… Read More »

AIDS 101 | National Geographic

(dramatic music) – [Narrator] About 37 million people around the world are currently living with AIDS making the disease one of the worst pandemics in modern history. AIDS or Acquired Immunodeficiency Syndrome is a disease in which the human immune system is severely impaired. It’s caused by the human immunodeficiency virus or HIV and is… Read More »

The Nightcrawlers – Full Documentary | National Geographic

RAFFY: When you drive around the streets of Manila, I don’t remember by place, landmarks, I remember crime scenes. There was one there and there, there. RAFFY: I have to fight becoming numb. That’s why I go to wakes, to funerals. To I guess know more about these victims. Try to find the story. RAFFY:… Read More »

Learning Control | Cesar Millan’s Dog Nation

CESAR: Sho ‘Nuff was rescued from a Korean dog meat market. But since coming to America, he’s been acting dangerously around other dogs. At my Dog Psychology Center in Los Angeles, I can work with him off-leash in a safe place. OLGA: I’m excited. CESAR: And hopefully, take the next step in his rehabilitation. OSCAR:… Read More »

Plague 101 | National Geographic

– [Narrator] Plague is notorious for causing mass sickness and devastation. But as much tragedy as the disease has caused, it also helped drive crucial scientific and social progress. Plague is an infectious disease caused by the bacterium Yersinia pestis. It mainly affects rodents, and spreads by way of insects. Because of these insect carriers,… Read More »

Pollution: Crash Course Ecology #11

I think we should do this one outside. This is better. This is beautiful. Just, oh, of course… except for this. Litter – is a kind of pollution, but like barely. Like, I would rather it not be here. It makes me kind of angry and it makes nature less pretty, but environmentally, there’s a… Read More »

Human Origins 101 | National Geographic

– [Narrator] Millions of years before industry, agriculture and civilization the world stage was set for one creature’s unprecedented rise. The story of humanity’s evolution began about seven million years ago when the human lineage broke away from that of chimpanzees. Over time an ensemble cast of over 20 early humans species or hominins came… Read More »

Neanderthals 101 | National Geographic

– [Narrator] Neanderthals are often depicted as brutish cave men, but science shows that our early ancestors were actually quite advanced. Neanderthals, or homo neanderthalensis, are our closest relatives in the human family tree. The species lived from about 400,000 to 40,000 years ago and inhabited an area that stretched as far was as Europe’s… Read More »

Dark Universe 101 | National Geographic

– [Instructor] The planets, moons, and stars make up less than 5% of all the mass in the universe. The rest lies in the realm of absolute darkness. The dark universe is the invisible, yet dominating, component of the cosmos. It includes a substance called dark matter and a force called dark energy. While little… Read More »

Hurricanes 101 | National Geographic

(heavy winds blowing) – [Narrator] Cyclone, typhoon, hurricane. All of these names are used around the world to describe the most powerful storm known to man. Hurricanes are unpredictable but scientists have a through understanding of how hurricanes form and sustain their power. In the Atlantic Ocean, hurricane season peaks during the late summer months… Read More »