National Geographics

Hang Son Doong - Son Trach commune in Bo Trach district, Quang Binh province - is the largest natural caves in the world. This cave is located in the caves of Phong Nha-Ke Bang. Hang is part of the underground system connected to more than 150 different activities in Vietnam, located near the border with Laos. (www.youtube.com)

(HD) Earth Under Water in Next 20 Years - National Geographic Documentary

Dive deep into the realm of creepy aquatic creatures to uncover the world's most bizarre water-dwelling tenants. Among them, a fish with a transparent head shows off everything it's got. Hermaphrodite flatworms battle to determine which among them will be male or female. A master-of-disguise octopus camouflages itself as a rock, a plant and even as a snake, to capture prey or elude pursuit. A lizard literally walks on water, while a fish "walks" on dry land to find a mate, and that's just for starters. (www.youtube.com)

In the animal kingdom, there's no shortage of bizarre behaviour. This episode burrows high and low ground to unearth some of the creepiest creatures who crawl on this planet! They range from those that fend off prey by squirting blood from their eyeballs, to others who eat their partner's right after mating, to others who raise their offspring in the carcasses of dead animals. And that's just a sampling of over 20 species whose antics you can hardly believe...or turn away from. (www.youtube.com)

Get ready to brush feathers with the freakiest members of the winged world. Take a whirlwind tour of the planet's wackiest and most fearsome fliers. Check out dancing manikins that bust out the moonwalk to impress the ladies; shrikes that impale their prey before ripping it apart; and lyrebirds with enough snazzy solos for a whole glee club. Plus discover that the sky isn't just for the birds. Venture into treetops ruled by gliding snakes and rivers teeming with jumping carp staging an airborne invasion.

The jaguar -- some call it the most mysterious and magnificent of all big cats. Ancient cultures considered them Gods for their power, beauty and speed. But little is really known about this species that stalks the deepest jungles. Researchers have collected information about male jaguars, but half of the picture is missing ... there's little know about females. For the first time, Boone Smith brings his expertise to Central and South America as he teams up with Dr. Howard Quigley, who leads Panthera's Jaguar Program.
National Geographic Wild (www.youtube.com)

When Christ was crucified 2,000 years ago a Roman guard thrust a spear in his side to see if he was still alive. In that moment a central tenet of Christian faith was realised: Jesus was dead, he was thus able to be resurrected. In that moment the spear that pierced him became a powerful holy relic. What happened to the Spear thereafter is a heady mix of myth, half truth and fact. To confuse matters further, today there are three Spears claiming to be the Holy Spear.

Responsible for unlocking many mysteries of the final frontier, the most renowned telescope in the world is in danger of being lost forever. The Hubble Space Telescope has explored the creation of stars and planets, the glory of supernovas and the formation of super massive black holes, charted dark matter and changed forever our understanding of reality itself. Now, it's spiraling toward the Earth, and astronauts are embarking on a dangerous mission to fix it.

This National Geographc documentary follows a an expedition to Palau, a remote chain of islands in the Pacific Ocean, as scientists unearth a collection of ancient human remains which are believed to be a new species. (www.youtube.com)

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