Activist Mikal Jakubal describes how he painted a crack on the Glines Canyon Dam one night in an effort to get the dam removed so salmon could return to spawning on the Elwha River. DAMNATION AIRS SUNDAY 10/9c.

Neil deGrasse Tyson asks Lansdorp about the potential dangers facing the first Mars One astronauts. STARTALK AIRS SUNDAYS 11/10c.

Neil deGrasse Tyson discusses the whether comparing the first Europeans arrival in America to the first humans landing on Mars is a sound analogy. STARTALK AIRS SUNDAYS 11/10c.

Gianna Talone Sullivan began experiencing Mary in a deeply personal way. Through her daily contact with Mary, she spreads messages to thousands in Maryland. EXPLORER: THE CULT OF MARY AIRS SUNDAY DECEMBER 13 at 8/7c.

Volcanoes are as dangerous as they are majestic. Over 50 eruptions rock our planet every year. This video helps you understand what causes volcanoes to form and erupt—and shows where they are most likely to be found.

Environmental anthropologist Kenny Broad and his team go underwater and underground to explore caves. “When things go great in cave diving, there’s nothing more spectacular in the world,” Broad says. “Then I get to the surface and I get to think about the problem of what did we learn, and how can it help us deal with water management, with climate change, with preserving fossils? All the things that matter for day-to-day life on the surface.”

Broad’s colleagues range from geologists to astrobiologists studying rare forms of life called extremophiles. The submerged caves “in some ways, are like time capsules,” Broad says, “because you’re looking at ancient fossils that are well-preserved because of the hydrogen sulfide layer that uses up all the oxygen. You’re also getting these microbes that are some of the earliest forms of life.”

It’s also like going in a time machine to learn about the ancient past. The divers “can take geologic samples, for example, and then study them and try to understand how climate change occurs—so how the ice ages occurred in the past—and that allows us to improve the models of future climate and our understanding of not just what’s going on with global warming, but [also] the larger record of global climate change.”

Broad says that for him, the experience of cave diving isn’t what people expect. “Adrenaline is your enemy underwater. It’s about calmness and keeping your heart rate down and your breath rate down.” He has to stay focused when there are multiple tasks and scientific objectives. “The bottom line is I love the experience of being in underwater caves, and now I’ve grown to love the entire process of doing science related to underwater caves, so it’s not just about exploration for exploration’s sake.”

Kenny Broad is a National Geographic Expeditions Council grantee. Read more about his work here. http://www.nationalgeographic.com/explorers/bios/kenny-broad/

Watch more from the web series Best Job Ever here: https://www.youtube.com/playlist?list=PLivjPDlt6ApSdbzgmWSexF3431900wSzb

PRODUCER: Carolyn Barnwell
EDITOR: Brent Levenson
SERIES PRODUCERS: Chris Mattle and Jennifer Shoemaker
GRAPHICS: Chris Mattle

To outsiders, the Kayapo might appear unsophisticated, but their use of video is far from it. The Amazon tribe in Brazil has been actively fighting against policies that threaten their environment and traditional ways of life. A few have become Kayapo “”video warriors.”” They arm themselves with cameras to document activities such as protests, confrontations with officials, and illegal logging and to promote government accountability. Kiabiete Metuktire is one of those video warriors who uses technology to protect his community.

Read more about the history and works of the Kayapo video warriors: http://ethnoground.blogspot.com/2012/04/miss-kayapo-filming-through-mebengokre.html

Read the National Geographic Magazine cover story on the Kayapo: http://ngm.nationalgeographic.com/2014/01/kayapo/brown-text

Hey guys! Thanks for watching. As a huge fan of DC and a very indecicive person, I thought it’d be awesome to do a drawing of the entire Justice League, seeing as I’ve already done individual drawings of Cyborg, Batman, and Superman. Check them out on my channel!
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แจกเครดิตฟรี 2020

Thanks to Jake Maxfield for the music
http://www.facebook.com/jakemaxfieldmusic

Superman. Batman. Only @Hectorisfunny can solve this argument.