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Nature

Neil deGrasse Tyson at Howard University 2010

Astrophysicist and master science communicator Neil deGrasse Tyson is blowing people’s minds by describing how tides actually work, as opposed to how we see them as mere humans.

He recently described the “misunderstood” phenomenon in an episode of “Star Talk” with co-host Chuck Nice.

“Tides are widely misunderstood. The next thing I say may be mind-blowing to you. The tide doesn’t actually come in and out. What happens is there is a bulge of water, two of them, on opposite sides of the Earth,” Tyson began his discussion.


“They are caused by the Sun and the Moon and Earth turns inside that bulge. So when we say [the tides] rise and fall, tidally what is happening is we are rotating into the bulge and then out of the bulge," he continued.

What you think you know about tides is all wrong…www.youtube.com

The quick explanation exposes an even greater scientific idea, that humans are limited in understanding because of our perspective and language. "So we're stuck with language, from our own perspective, rather than the language of what's actually happening,” Tyson explains. “It's simpler to say the water goes in and out. It's simpler to say the sun set rather than, Earth rotated such that our angle of view on this stationary sun fell below our local horizon."

For a more in-depth description of how tides work from “Star Talk,” check out the video below. The famed scientist also wrote a blog post on the tidal forces back in 1995, which describes the phenomenon on an even deeper level.

Neil deGrasse Tyson Explains the Tideswww.youtube.com

Science

32 years separate this before and after of a beautiful Washington forest. Take a look.

Our relationship with our planet can be mutually beneficial if we commit ourselves to sustainability.

A return to green over decades.


Douglas Scott grew up on Washington's Olympic Peninsula in the dying shadow of the timber industry that had supported the region for decades.

"Nearly every home had a bright orange or yellow sign reading 'This home supported by timber dollars,'" Scott wrote on Outdoor Society.


While the region has also been recognized for its succulent seafood, temperate climate, and stunning natural formations, nothing shaped the community — or the physical landscape — quite like logging did.

rebuilding, Olympic Peninsula, logging

Logging repercussions felt on the Olympic Peninsula.

Olympic Peninsula, circa 1972. Photo from the Records of the Environmental Protection Agency.

The tension in the air between the loggers and the environmentalists throughout the 1980s was thicker than the trees being cut down.

"I heard from old timers in the Harbor about how environmentalists were ruining the region, and I was told by environmentalists that loggers were killing everything in sight," Scott recalled.

But to understand the full impact of deforestation on the region, it helps to take the bird's eye view.

Here's a satellite image of the Olympic Peninsula from 1984. The white region in the center are the mountaintops in Olympic National Park; you'll also notice the grey and brown areas along the western and northern coasts of the peninsula.

satellite images, deforestation, tourism

Satellite image of deforestation on the region of the Olympic Peninsula.

Screenshot via GoogleEarth Engine.

"When I moved away from the area in 1997, there wasn't much of a logging or mill economy in dozens of towns around the region," Scott said.

By that time, tourism had begun to take the place of timber as the region's major industry — which was probably helped along by the fact that the trees were slowly but surely starting to recover, enhancing the already stunning vistas that drew visitors.

Here's how the Olympic Peninsula looked by the time that Scott and his family left the area; you'll notice the western and northern coasts are just a little bit greener than they were 13 years prior...

recovery, ecology, healing

Some green coming back.

Screenshot via GoogleEarth Engine.

Those great green arbors continued their gradual recovery into the 2000s...

trees, parks, Google Earth

More forest returns to the peninsula.

Screenshot via GoogleEarth Engine.

And they're still going today.

ecosystem, timber, wood

And still more green comes back.

Screenshot via GoogleEarth Engine.

But those isolated moments don't tell the whole story of the region's recovery. It's even more remarkable when you can see it in action...

habitat, climate change, going green

Olympic Peninsula demonstrating the power of nature.

GIF via GoogleEarth Engine.

We don't always notice the world changing right before our eyes, but the decades-long view of the Olympic Peninsula shows the true power of nature.

It's not just the trees, either; according to Scott, the replenished forests have also had a positive impact on the local salmon population and other treasured natural resources.

erosion, growth, wildlife, earth

Mother Nature doing her thing.

Left photo from Records of the Environmental Protection Agency; Right, by Miguel Vieira/Flickr.

That doesn't mean we shouldn't use the natural world, of course. We still need wood, for example, but now we know there are sustainable ways to use it without recklessly damaging to the planet.

The Earth was built to take care of itself. We just need to let Mother Nature do her thing.


This article originally appeared on 12.22.16

A young woman drinking bottled water outdoors before exercising.



The Story of Bottled Waterwww.youtube.com

Here are six facts from the video above by The Story of Stuff Project that I'll definitely remember next time I'm tempted to buy bottled water.

1. Bottled water is more expensive than tap water (and not just a little).

via The Story of Stuff Project/YouTube


A Business Insider column noted that two-thirds of the bottled water sold in the United States is in individual 16.9-ounce bottles, which comes out to roughly $7.50 per gallon. That's about 2,000 times higher than the cost of a gallon of tap water.

And in an article in 20 Something Finance, G.E. Miller investigated the cost of bottled versus tap water for himself. He found that he could fill 4,787 20-ounce bottles with tap water for only $2.10! So if he paid $1 for a bottled water, he'd be paying 2,279 times the cost of tap.

2. Bottled water could potentially be of lower quality than tap water.


via The Story of Stuff Project/YouTube

Fiji Water ran an ad campaign that was pretty disparaging about the city of Cleveland. Not a wise move. The city ordered a test of the snooty brand's water and found that Fiji Water contained levels of arsenic that weren't seen in the city's water supply.

How was that possible? Sarah Goodman of the New York Times explains:

" Bottled water manufacturers are not required to disclose as much information as municipal water utilities because of gaps in federal oversight authority. Bottom line: The Food and Drug Administration oversees bottled water, and U.S. EPA is in charge of tap water. FDA lacks the regulatory authority of EPA."

3. The amount of bottled water we buy every week in the U.S. alone could circle the globe five times!

via The Story of Stuff Project/YouTube

That sounded like it just had to be impossible, so we looked into it. Here's what our fact-checkers found:

"According to the video, ' People in the U.S. buy more than half a billion bottles of water every week.' National Geographic says for 2011, bottled water sales hit 9.1 billion gallons (roughly 34 billion liters).

A 'typical' water bottle is a half-liter, so that's about 68 billion bottles per year. Divided by 52 weeks would be a little over 1 billion bottles of water sold per week in the U.S. Because that's based on a smaller 'typical' bottle size, it seems reasonable that a half billion bottles a week could be accurate.

The Earth is about 131.5 million feet around, so yep, half a billion bottles of varying sizes strung end-to-end could circle the Earth five times."

4. Paying for bottled water makes us chumps.

via The Story of Stuff Project/YouTube

Beverage companies have turned bottled water into a multibillion-dollar industry through a concept known as manufactured demand. Bottled water advertisements used a combination of scare tactics (Tap water bad!) and seduction (From the purest mountain streams EVER!) to reel us in.

Well, we now know their claims about the superior quality of bottled water are mostly bogus. And research shows that anywhere from a quarter to 45% of all bottled water comes from the exact same place as your tap water (which, to reiterate, is so cheap it's almost free).

via The Story of Stuff Project/YouTube

5. Bottled water is FILTHY.

It takes oil — lots of it — to make plastic bottles. According to the video, the energy in the amount of oil it takes to make the plastic water bottles sold in the U.S. in one year could fuel a million cars. That's not even counting the oil it takes to ship bottled water around the world.

And once we've guzzled our bottled water, up to 80% of the empty bottles end up in landfills or noxious-gas-producing incinerators. The rest is either recycled or shipped to countries like India where poor people without environmental and labor protections have to deal with it.

On top of all that, the process of manufacturing plastic bottles is polluting public water supplies, which makes it easier for bottled water companies to sell us their expensive product.

6. There are 750 million people around the world who don't have access to clean water.

Photo by H2O for Life.

A child dies every minute from a waterborne disease. And for me, that's the core of what makes bottled water so evil.

The video wraps by comparing buying bottled water to smoking while pregnant. That may sound extreme, but after learning everything I just did about the bottled water industry, I can't disagree.

via The Story of Stuff Project/YouTube

If you're properly disgusted, here are a few ways you can help destroy the bottled water industry:

  1. Don't buy bottled water. Get a reusable water bottle. The savings will add up.
  2. Rally your schools, workplaces, and communities to ban bottled water.
  3. Demand that your city, state, and federal governments invest in better water infrastructure.


This article originally appeared on 5.7.15

Science

Pennsylvania home is the entrance to a cave that’s been closed for 70 years

You can only access the cave from the basement of the home and it’s open for business.

This Pennsylvania home is the entrance to a cave.

Have you ever seen something in a movie or online and thought, "That's totally fake," only to find out it's absolutely a real thing? That's sort of how this house in Pennsylvania comes across. It just seems too fantastical to be real, and yet somehow it actually exists.

The home sits between Greencastle and Mercersburg, Pennsylvania, and houses a pretty unique public secret. There's a cave in the basement. Not a man cave or a basement that makes you feel like you're in a cave, but an actual cave that you can't get to unless you go through the house.

Turns out the cave was discovered in the 1830s on the land of John Coffey, according to Uncovering PA, but the story of how it was found is unclear. People would climb down into the cave to explore occasionally until the land was leased about 100 years later and a small structure was built over the cave opening.



The idea was to make it accessible to visitors and use the cave as a tourist attraction, and the small structure was eventually built into a two-story house. But it was closed to the public in 1954 after the land was purchased for limestone mining and it remained closed for nearly 70 years. (In the words of Stephanie Tanner, "How rude.") Sometime during that 70-year closure, the home that contains the cave was purchased by Dara Black, and in 2021, it reopened to the public.

Currently, the home is occupied by Black, but to gain access to the cave you can simply book a tour. The best part about booking a tour is that you only have to make a donation to enter. It's a pay-what-you-can sort of setup, but since someone actually lives in the home, you can't just pop in and ask for a tour. You have to go during the "open house" times available.

According to the Black-Coffey Caverns Facebook page, they treat the tours truly as an open house, complete with snacks and drinks. There's a waiting room area where people can chat and eat their snacks while they wait for the tour to start. They also offer cave yoga once a month. According to Uncovering PA, the tour takes about 45 minutes to complete and there are about 3,000 feet worth of passageways.

Imagine living on top of a cave and just taking strangers on a waltz under your floorboards essentially. It makes me wonder if the house is quiet at night or if you can hear echoes of the cave sounds while you're trying to sleep. From the Facebook page, it appears that the cave doesn't have any lights, but there were pictures with some Christmas lights mounted to the cave walls. Otherwise, you have to use flashlights.

Hopefully, no mischievous children decide to play hide and seek or you just might have to call in a rescue crew. Literally. But what an unbelievable "pics or it didn't happen" kind of story to tell. It's not every day you run into someone that has a door that leads you to an underground cave.

If you want to see what a cave tour looks like starting from the outside of the house, check out the video below:

This article originally appeared on 1.30.23