Categories
Nature

Rainbow Waterfall at Yosemite National Park

Said the “Father of the National Parks“ of America’s national parks John Muir, “Most people are on the world, not in it.” His advocacy helped protect the Yosemite Valley and ultimately led to the establishment of Yosemite National Park.

The video of the rainbow waterfall by landscape photographer Greg Harlow at Yosemite is just one of the many wonders in the 747,956 acres park. Yosemite also played host to the recent documentary entitled Free Solo which filmed the super sensation seeker Alex Honnold climb El Capitan, the vertical granite rock formation located at Yosemite National Park.

PS. If you’re interested in learning the art of adventure photography and film, consider taking National Geographic photographer and the producer of Free Solo, Jimmy Chin’s course teaching adventure photography course on MasterClass. 

Categories
Space

The evolution of the spacesuit

As spacesuit design continues to become thinner and more dynamic — there are touchscreen sensitive gloves, an attached helmet and built-in ventilation in the latest uniform — it’s worth looking at how both US and Russian spacesuits have evolved over time.

Start by looking at the original suit designed for the moon mission above, then check out the diagram below. I still like the simplicity and balance of the Apollo A7-L EVA but the blue Apollo A5-L suit is ace as well.

Categories
Nature Science

Natural light prevents myopia

A report issued in Nature reveals that staying inside is the leading cause of myopia.

The finding refutes the myth that closeupness is the result of intense reading seasons and screen activity.

Outdoor light is beneficial to the eyes because it triggers the release of dopamine in the retina.

One myopia researcher recommends spending at least three hours a day in natural light, even if means sitting under a tree.

But what scientists really needed was a mechanism: something to explain how bright light could prevent myopia. The leading hypothesis is that light stimulates the release of dopamine in the retina, and this neurotransmitter in turn blocks the elongation of the eye during development. The best evidence for the ‘light–dopamine’ hypothesis comes — again — from chicks. In 2010, Ashby and Schaeffel showed that injecting a dopamine-inhibiting drug called spiperone into chicks’ eyes could abolish the protective effect of bright light 11 .

Categories
Science

The spherical nature of the Earth

The world is round, and it has been for some time despite the rise of the flat earth movement.

Take a look at some of the armillary spheres below, starting with the Chinese diagram from 1092. Even back then, they had could rationalize that the Earth adopted a round shape.

The curvy nature of the Earth is manifest.

Chinese Diagram, 1092

From Su Song’s book of 1092 

Damascus, 1526

Work of Taqi al-Din from the Constantinople observatory

Germany, 1585

Sphere on top of an astronomical clock, made in Kassel, Germany by Jost Bürgi and Antonius Eisenhoit
Categories
Nature

Radiant Sodalite mineral rock

A rare discovery, sodalite rocks form from crystallized from sodium-rich magmas and are typically blue or violet in nature. #gif #science #earth #rock

How neat is this sodalite mineral rock?

A rare discovery, sodalite rocks form from crystallized from sodium-rich magmas and are typically blue or violet in nature.

Think of the sodalite as a normal stone with special effects that make it glow. Check out its cousin, the fire opal.

Categories
Science Space

What the sunset looks like on Mars

NASA’s Curiosity Rover photographed this view of the sun setting from its 956th Martian day on Mars.

The above image is actually a sequence of four images taken over a span of 6 minutes, 51 seconds. Check out the full GIF below.

Said Mark Lemmon of Texas A&M University, College Station who planned the Curiosity mission: “The colors come from the fact that the very fine dust is the right size so that blue light penetrates the atmosphere slightly more efficiently.

“When the blue light scatters off the dust, it stays closer to the direction of the sun than light of other colors does. The rest of the sky is yellow to orange, as yellow and red light scatter all over the sky instead of being absorbed or staying close to the sun.”

So cool.