Is a tomato a fruit or a vegetable?
Is a tomato a fruit or a vegetable? It depends on who you believe: botanists or the Supreme Court. Here’s the story.
How do astronauts go to the bathroom in space?
If you’ve ever watched astronauts, you’re bound to wonder at some point: Where – and how – do they go to the bathroom?
Is ‘blue blood’ ever really blue?
Is blood ever blue? That is, is there ever really such a thing as blue blood – outside the science-fiction world, anyway?
Can you grow your own penicillin?
Is it possible to grow your own penicillin at home? Not just any mold, but actually make mold with medicinal benefits. Solid gold mold Penicillin was discovered rather accidentally by Alexander Fleming in 1928, when he noticed that mold growing in a petri dish had killed all the staph bacteria around it. Since then, penicillin has gone…
Is it true that no two snowflakes are alike?
Despite manmade paper snowflakes looking the same every year, scientists say the old saying is true: no two snowflakes are alike – if they’re large enough, that is. Find out more and see examples here!
Why do zebras have stripes?
After evolving from horses some two million years ago, zebras came to have a distinctive pattern. So why do zebras have stripes? A team of scientists has found at least part of the answer.
Why do fish have mercury in them?
How come fish have mercury in them – because isn’t seafood supposed to be healthy to eat?
What is a sesame – like, what grows from a sesame seed?
If you have sesame seeds, what will they actually grow into? Put simply: What is a sesame plant like?
How do you find out if there was an earthquake?
If you think you felt a little shaking going on, how can you find out for sure if there was an earthquake or not? We know all the best places to look.
Treasure hunt: Are there still any shipwrecks left to discover?
Considering all the technology available now, you may wonder: Are there any shipwrecks – or pirate treasure – yet to be discovered?
Is the city of Venice really sinking?
Is it true that the Italian city of Venice is sinking – to such a degree that it will be underwater in the near future? Here’s what’s happening.
What is the difference between AM and FM radio?
What is the difference between AM and FM radio – aside from the obvious programming differences with talk radio versus music?
When planes ‘dump fuel,’ where does it go?
If you’ve heard of a plane having to dump fuel before landing, you probably wonder: Why would they waste that expensive jet fuel – and where does it all go?
What are the northern lights?
Nature’s own light show, the aurora borealis, or Northern lights, have been dazzling observers for, well, as long as there have been observers. But what is it?
How can you better remember your dreams?
Why do people have trouble remembering their dreams? And more to the point: is there anything you can do to improve your dream recall? Get some tips here!
Why does helium make your voice sound higher?
You probably remember messing around with helium balloons and having a great time sounding like Alvin and the Chipmunks. But why does that work?
How does the jet stream speed up plane travel?
You might hear pilots talking about headwinds and tailwinds, but how does the jet stream actually affect your flight? More to the point: What is the jet stream?
Where can you find out about upcoming meteor showers?
What creates meteor showers, and where can you find out the best times and places to see lots of these shooting stars?
How is glass recycled?
After you toss your empties into the recycling bin, where do your bottles and jars go? The glass recycling journey is simpler than you may think.
How many people have ever lived on Earth?
How many people have ever lived on Earth in all of time? Is it even possible to answer this question? Yes, it is possible.