Why did NASA spend millions developing a pen that would work in space when a pencil is just as good?
They didn’t. The “million-dollar space pen” story is an urban legend that just refuses to die. Pencils aren’t “just as good” in zero-G; in fact, they’re absolutely terrible….
If the universe is so big, why haven’t we encountered an advanced alien civilization yet?
Look at it like this. If there were intelligent life out there, how would they know about us? The only way is by monitoring radio transmissions. The first…
Is it true that the earth is round?
In 1989 I saw a slightly different proof that our earth is round 🙂 There are many ways to prove that our earth is round. But in 1989…
If you take a gallon of water from the deepest ocean and bring it up to the surface in a sealed container, will the pressure break the container as it is risen up into the surface?
At the depth of the typical ocean floor — about 3km — water is compressed to 98.2% of its sea-level volume. The Mariana Trench is just over 11km…
If I have a circular disc of radius 300,000 km and made it rotate with 1 rad/s, wouldn’t a particle on the edge of that circular disc exceed the speed of light?
No. This is a very common thought-experiment – called the Ehrenfest paradox – and like most paradoxes – it isn’t a paradox at all. The problem is that you’re imagining…
What is the scariest theory known to man?
When we die and subsequently stop breathing, our brain and nerve cells die within a few minutes due to the lack of oxygen. Once a person dies though,…
Why can’t we dig deeper than 12.2 km into the Earth?
12.2 km is not a theoretical limit, it is the depth of the 1970 Russian Kola Superdeep hole project which was abandoned at that point (after 20 years)…
Could the North Star possibly be a sun with its own solar system?
Whoa! You’re underestimating the north star! POLARIS – Dhruva for us in India – is a multiple star system containing a total of 5 stars. Polaris appears to us as…
Can you share some mind blowing science phenomena in pictures?
Is science boring? … opinion would change once you’ve been through these cool and beautiful scientific phenomena. 1) Reaction of mercury and aluminum: 2) Human white blood cells…
Is it true that Jupiter is so large that it does not orbit around the sun?
Yes! Jupiter, The biggest planet in our solar system. It is so massive that 1300 earths could fit inside of this planet. Jupiter is 2.5 times more massive…