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How Coronavirus Has Helped to Clear the Air
science.howstuffworks.com/environmental/green-science/coronavirus-improved-air-quality.htm
Satellite data shows just how much air quality has improved during the coronavirus crisis, from China, India, Italy and beyond.
What Is Coronavirus?
health.howstuffworks.com/diseases-conditions/respiratory/corona-virus.htm
There are many types of coronaviruses. But more than a year has passed since a new strain — SARS-CoV-2 — emerged in China and rapidly spread across the globe, infecting more than 90 million and killing more than 2 million. What has — and hasn't — changed since then?
What's the Difference Between a Cave and a Cavern?
science.howstuffworks.com/environmental/earth/geology/cave-cavern-difference.htm
One term might give you the impression of something grand and mysterious, while the other makes you think of claustrophobia-inducing environs that threaten human life. But what's the real difference?
When Does an Epidemic Become a Pandemic?
health.howstuffworks.com/diseases-conditions/infectious/pandemic.htm
The World Health Organization just declared the coronavirus a full-blown pandemic. What does that even mean, and how is that different from an epidemic?
The 10 Longest Bridges in the World
science.howstuffworks.com/engineering/civil/longest-bridges-in-world.htm
Bridges connect people and places, with inspired engineering and views that can't be beat. Here are the 10 longest in the world.
What's the Longest Suspension Bridge in the World?
science.howstuffworks.com/engineering/structural/world-longest-suspension-bridge.htm
Until 2022, the longest suspension bridge in the world was in Japan. Now, the 1915 Canakkale Bridge in Türkiye has taken the title
Can the Feds Close State Borders to Stop COVID-19?
people.howstuffworks.com/can-feds-close-state-borders.htm
Some legal experts say the U.S. government can't close state borders or quarantine entire cities to stop the coronavirus from spreading. Others disagree.
10 Construction Projects That Broke the Bank
science.howstuffworks.com/engineering/structural/10-construction-projects.htm
Whether we're trying to save a sinking city or dig a massive tunnel, our appetite for construction knows no bounds. But if designers had known the actual cost of these 10 projects, they might have gone back to the drawing board.
10 of the Most Endangered Fish Species in Our Oceans
animals.howstuffworks.com/endangered-species/top-10-most-endangered-fish.htm
So what if one of these endangered fish ends up on your hook? The best policy is to release them back into the water, but not before making a few observations.
How Foot Binding Worked
people.howstuffworks.com/culture-traditions/cultural-traditions/foot-binding.htm
What was foot binding? Find out how foot binding worked from HowStuffWorks.