The Most Amazing Thing About Trees
AdultsEcologyNatureScience...Trees create immense negative pressures of 10's of atmospheres by evaporating water from nanoscale pores, sucking water up 100m in a state where it should be boiling but can't because the perfect xylem tubes contain no air bubbles, just so that most of it can evaporate in the process of absorbing a couple molecules of carbon dioxide. Now I didn't mention the cohesion of water (that it sticks to itself well) but this is implicit in the description of negative pressure, strong surface tension etc.
Dead stuff: The secret ingredient in our food chain
AdultsEcologyFoodScience...When you picture the lowest levels of the food chain, you might imagine herbivores happily munching on lush, living green plants. But this idyllic image leaves out a huge (and slightly less appetizing) source of nourishment: dead stuff. John C. Moore details the "brown food chain," explaining how such unlikely delicacies as pond scum and animal poop contribute enormous amounts of energy to our ecosystems.
Spectacular Time Lapse Dam "Removal" Video
AdultsFilmNatureEnvironment...he White Salmon River in Washington state is flowing again as the nearly 100-year-old Condit Dam was disabled with explosives Wednesday. The reservoir draining took about 2 hours. Further demolition is scheduled in 2012. The event is a significant milestone for river restoration and dam removal nationwide.
Drones Over Dolphin Stampede and Whales off Dana Point and Maui
AdultsAnimalsNatureTechnology...Captain Dave Anderson of Capt. Dave's Dolphin and Whale Safari in Dana Point, California, at great personal risk, has recently filmed and edited a 5-minute video that contains some of the most beautiful, jaw-dropping, footage ever taken with a drone from the air of a huge mega-pod of thousands of common dolphins stampeding off Dana Point, California, three gray whales migrating together down the coast off San Clemente, California, and heartwarming close-ups hovering over a newborn Humpback whale calf snuggling and playing with its mom as an escort whale stands guard nearby, filmed recently in Maui.
Coke Can Getting Swallowed By Lava
AdultsEnvironmentNatureScience...This is what happens when a coke can meets some flowing lava.
Gretna Green Starling Murmurations
AdultsAnimalsNaturePhotographyShot with Canon C100, Canon 70-200 F2.8, Canon 1.4 TC.
Sleeping hummingbird "snores" in Peru
AdultsAnimalsEnvironmentNature...A female Amethyst-throated Sunangel (Heliangelus amethysticollis) sleeps in Peru.
The first 100 Days of Mei Lun and Mei Huan
AdultsAnimalsLifeNature...One hundred days of "Cub A" and "Cub B" are over, and the twin giant panda cubs have officially been named Mei Lun and Mei Huan. Born July 15, 2013, Mei Lun and Mei Huan are the first surviving pair of giant panda twins ever born in the U.S. and are the fourth and fifth offspring of Lun Lun and Yang Yang.
Hand Feeding & Playing With A Friendly Platypus
AdultsAnimalsEnvironmentNature...This beautiful platypus loved playing in the water and loved a tickle! She was so friendly and ate food right out of my hand!
TED - Underwater astonishments
AdultsAnimalsEnvironmentNature...David Gallo shows jaw-dropping footage of amazing sea creatures, including a color-shifting cuttlefish, a perfectly camouflaged octopus, and a Times Square's worth of neon light displays from fish who live in the blackest depths of the ocean.