Hank revisits his passion for exploring the Red Planet, breaking down the two biggest challenges of sending humans to Mars: radiation and propulsion. He explains the science behind the obstacles future Mars-bound astronauts will face, as well as they technology they’ll have to use to surmount them. Onward!
It has been speculated that silicate particles (a component of glass) in the atmosphere of HD 189733b, located 63 light years away, gives the planet its blue color as well as a possible superheated glass storm.
Sinkholes may vary in size from 1 to 600 m (3.3 to 2,000 ft) both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may be formed gradually or suddenly, and are found worldwide.
The Earth is 4.6 billion years old — but how can humans relate to a number so colossal, and where do we fit on the geologic timeline? Comparing the Earth’s lifetime to one calendar year, events like the extinction of dinosaurs and Columbus setting sail took place relatively recently. Joshua M. Sneideman reminds us of our time and place in the universe.
Hidden for all of human history, a 460 mile long canyon has been discovered below Greenland’s ice sheet. Using radar data from NASA’s Operation IceBridge and other airborne campaigns, scientists led by a team from the University of Bristol found the canyon runs from near the center of the island northward to the fjord of the Petermann Glacier.
There is a massive wildfire raging in California, the largest in the state’s hsitory, that has consumed an area roughly 10 times the size of Manhattan. This beautiful yet disturbing video shows the fire consuming everythign in it’s path including towering sequoias which are some of the biggest and oldest trees in the world.