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How Old Is Earth and How Did Scientists Figure It Out?
science.howstuffworks.com/how-old-is-earth.htm
In 1953, CalTech geochemist Clair Patterson came up with an estimate for Earth's age that still holds today.
How Stars Work
science.howstuffworks.com/star.htm
When you look up at night and see thousands of stars, have you ever wondered what you are looking at? Learn what stars are and how they live and die!
What is fertilizer and why do plants need it?
home.howstuffworks.com/question181.htm
What is fertilizer and why do plants need it? What do the three numbers on most bags of fertilizer mean?
How the Ferrari 599 GTB Fiorano Works
auto.howstuffworks.com/ferrari-599-gtb-fiorano.htm
The Ferrari 599 GTB Fiorano climbs from 0-100 mph in seven seconds flat. Learn more about the most powerful front V-12 GT Ferarri has ever produced.
How Eco-anxiety Works
science.howstuffworks.com/environmental/green-science/eco-anxiety.htm
Eco-anxiety is a chronic concern over environmental issues. Learn about eco-anxiety a treatments for eco-anxiety.
Why Do We Yawn?
science.howstuffworks.com/life/inside-the-mind/human-brain/question572.htm
What makes us yawn and why does it seem to be contagious? Find the answers to these questions and more about yawning at HowStuffWorks.
What Is the Strongest Metal on Earth?
science.howstuffworks.com/environmental/earth/geology/titanium.htm
Let's take a look at some of the strongest metals on Earth and their surprising uses.
A Guide to Home Safety
home.howstuffworks.com/home-improvement/household-safety/a-guide-to-home-safety.htm
Home safety is an important issue. Learn valuable safety precautions that will reduce the risk of an injury or death occurring in your home.
Doomsday Clock Now Closest It's Ever Been to Midnight
science.howstuffworks.com/environmental/earth/geophysics/doomsday-clock.htm
The Bulletin of Atomic Scientists moved the Doomsday Clock to 90 seconds before midnight, the closest it's ever been to global catastrophe. What does this mean for humanity?
How Mangrove Forests Are Great for the Planet
science.howstuffworks.com/life/botany/mangroves.htm
Mangroves provide a habitat for wildlife such as fish, birds, deer and insects. They also stabilize shorelines, protect against storm surges and improve water quality. What's not to love?