Science story
The truth about 'stealth planes' and why they are so hard to hide in the sky
Stealth, should be understood as a range of technologies, designs, production methods, and combat tactics.
Hard
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Articles about Hard
692 published items.
History
Little known truth about old posters: It's hard for criminals to escape!
Even though the pictures on the posters are so badly drawn that even relatives of the criminals can hardly recognize them. But, criminals are still hard to escape! Why?
Science story
Mathematician solves 150-year-old super-difficult chess problem
Appearing in 1869, the 'hard problem' with chess pieces has caused headaches for scientists for more than 150 years.
New technology
Successfully made super-hard diamond glass by compressing a 'carbon soccer ball'
Diamond glass material has great potential in electronics manufacturing.
Health
11 weird experiences that happen while you sleep
Everyone wants to have a good night's sleep after a hard day's work. But surely everyone has experienced a strange feeling while sleeping
Scientific application
Super hard diamond glass with highest thermal conductivity
Experts use pressure to transform a carbon material into a new type of glass that has the potential to be mass-produced with a wide range of applications.
Conquer Mars
The unexpected reason why the planet 'better than Earth' is not habitable
A planet that had a wetter start than Earth - a good sign because water is what sustains life - but isn't viable just because... it's a bit small.
Space science
Why are people so hard to live on the Moon and Mars?
Humans could not live on the Moon and Mars due to the high radioactivity and cosmic radiation.
New technology
MIT: Sugar made of stiffer materials will save gasoline, limiting CO2 emissions
A study by scientists from the Massachusetts Institute of Research has shown that if the road surface is made of stronger and stiffer material, it can significantly save…
Archeology
Hard to believe in a land where one-third of women carry other human genes
An unexpected gift from the extinct ancestors - the Neanderthals, who brought unexpected luck to the women who owned it.
Health
10 signs that iodine deficiency
Feeling constantly cold, hair loss, hard to remember, irregular menstruation ... you should check the amount of iodine in the diet.
Discover science
Why are some parts of the body reborn and others not?
Scientists have long tried to answer this question, and so far we know why.
New technology
What is folding glass? Is it the future of the phone?
Samsung Galaxy Z Flip is the first folding phone with a glass screen. Previous devices like the Samsung Galaxy Fold all have plastic screens.
Animal world
Why do crabs foam?
When we buy crab, we have to choose live crab with hard shell, release a lot of white foam. What is the rule of this?