Trivia

Hard

What Changed The Color Of Yellowstone National Park’s Morning Glory Hot Spring?

Fertilizer Runoff
Global Warming
Acid Rain
Trash

Answer: Trash

Visitors have flocked to see the Morning Glory thermal spring in Yellowstone National park for decades to enjoy its vibrant colors. Among the mud, rock, and simple pine forest backdrop, the spring is a burst of intense color: deep oranges, bright yellow, and emerald greens.

The current coloration of the spring is actually a rather recent change, however, and if you went to visit the spring before the 1950s, you’d see something entirely different. Back then, the spring was an intense and beautiful blue color (a shade not seen at all by modern visitors). In fact, the very name of the spring, Morning Glory, is a reference to the intense blue color of Morning Glory flowers.

So what happened to the bright blue color? The color of the spring is the result of microbial activity. There are thousands of different microbes active in hot springs and they all have rather specific temperature preferences. Years ago, the temperature of the spring was higher and the blue pigment producing microbes flourished. Today the temperature is slightly lower and the microbes that prefer the new temperature range produce yellow-orange and green pigments.

If visitors to the park are disappointed that the spring is no longer blue, they ultimately have no one to blame but themselves. Decades of tourists tossing coins, rocks, and other debris into the spring changed the flow of hot water underground and lowered the temperature of the surface water. The blue-pigment microbes died out and the new microbes took over. Unless some subterranean shift occurs where more hot water can again flow to the surface, Morning Glory will never be blue again.

Trivia

Very Hard

Half-Life 2 Includes An Homage To Which Sci-Fi TV Show?

Trivia

Easy

In Computer Lingo, Small USB-Based Hardware Additions Are Called What?

Trivia

Hard

Which Of These Streaming Services Originally Cost A Dollar An Hour?

Trivia

Very Hard

The Fastest Rotating Planet In The Solar System Is?

Trivia

Easy

A Former Japanese Military Base Is Now Overrun By Tame?

Trivia

Easy

The Largest Gold Statue In The World Is A Statue Of What?

Trivia

Very Hard

Which 1980s Film Was Criticized As Being A Feature Length Commercial?

Trivia

Easy

Russia’s Secret Cold War Maps Of What Are Now Preferred To Official Maps?

Trivia

Hard

Specialists Working On NASA’s Mars Exploration Rover Project Received Custom?

Trivia

Easy

Among The Many Types Of Alcohol, The Type We Drink Is?