NX1Z via Wikimedia Commons // Public Domain
NX1Z via Wikimedia Commons // Public Domain

Famous Giant Sequoia Topples in California Storm

NX1Z via Wikimedia Commons // Public Domain
NX1Z via Wikimedia Commons // Public Domain

Northern California’s famed Pioneer Cabin Tree, a giant sequoia in Calaveras Big Trees State Park that was carved out to form a tunnel big enough to drive through, fell down during a recent rainstorm, according to the San Francisco Chronicle’s SFGATE. The tree had been a tourist destination for more than a century.

In the late 19th century, the owners of the Calaveras North Grove carved out the tunnel in the tree in response to a similar tree tunnel in Yosemite that was drawing visitors away from Calaveras. The tree was chosen because a large fire scar already prevented a tree top from growing [PDF]. At one point, the park even allowed cars to drive through the tree, but recently only hikers have been allowed to pass through its trunk.

The tree toppled over around 2 p.m. local time on Sunday, January 8 during a heavy rainstorm. Sequoias have shallow roots, and the trail around it was completely flooded, likely resulting in its fall. The tree "shattered" on impact, according to a park volunteer who witnessed the incident.

It’s not that unusual for giant sequoias to fall over unexpectedly, especially in soggy ground. In 2011, two giant sequoia trees, each around 1500 years old, fell over along the Trail of 100 Giants in Sequoia National Forest, destroying that section of the trail. The Yosemite tunnel tree that sparked the carve-out of the Calaveras tree in the 1880s, the Wawona Tunnel Tree, collapsed in 1969. The Los Angeles Times reports that most old sequoias die by falling, especially when wet soil combines with their extreme weight to tip over an already-leaning tree. The Pioneer Cabin Tree had been leaning for several years prior to its fall.

[h/t SFGATE]

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Why Does the Sky Look Green Before a Tornado?
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iStock

A common bit of folklore from tornado-prone parts of the U.S. says that when the skies start taking on an emerald hue, it's time to run inside. But why do tornadoes tend to spawn green skies in the first place? As SciShow's Michael Aranda explains, the answer has to do with the way water droplets reflect the colors of the light spectrum.

During the day, the sky is usually blue because the shorter, bluer end of the light spectrum bounces off air molecules better than than redder, longer-wavelength light. Conditions change during the sunset (and sunrise), when sunlight has to travel through more air, and when storms are forming, which means there are more water droplets around.

Tornadoes forming later in the day, around sunset, do a great job of reflecting the green part of the light spectrum that's usually hidden in a sunset because of the water droplets in the clouds, which bounce green light into our eyes. But that doesn't necessarily mean a twister is coming—it could just mean a lot of rain is in the forecast. Either way, heading inside is probably a good idea.

For the full details on how water and light conspire to turn the sky green before a storm, check out the SciShow video below.

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New Contest Will Give Kids the Chance to Become Weather Channel Meteorologists for a Day
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iStock

Not every kid dreams of being an on-air meteorologist, but for young ‘uns obsessed with storm forecasts and local weather reports, a new contest presents a unique opportunity to live out their dreams. The Mini Meteorologist Contest, sponsored by Lands’ End, will give four kids a chance to present a weather report on The Weather Channel this summer.

The nationwide contest is open to future meteorologists in the U.S. and Canada ages 6 to 16. To enter, they just have to write an essay between 50 and 500 words long on why they love learning about science and weather and why they’d like to be a meteorologist for a day. Four winners will receive a trip for them and their parents to The Weather Channel’s headquarters in Atlanta. They’ll have the opportunity to report the weather for the show on July 12, which happens to be National Summer Learning Day.

The essays will be judged based in equal parts on creativity, grammar, and the entrant’s love of meteorology. The only rules for the essays are that they can’t mention any products or brands other than Lands’ End or The Weather Channel (so no essays about how L.L. Bean inspired your love of cloud formations, kids) and has to be the child’s original work. Kids who are chosen as semi-finalists will have their on-air presentation skills judged in a Skype interview.

Should they win, they’ll get an inclusive trip to Atlanta with media training, a tour of The Weather Channel headquarters, and a $500 Lands’ End gift card to get just the right weather-reporting wardrobe.

The deadline for entering is May 21. Essays can be submitted here.

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