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The secret behind the color of the passports
Passports in the world come in 4 colors. Each color can say a lot about that country even though there are no specific rules.
Red
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Articles about Red
1,787 published items.
Archeology
The unexpected grave of the jade-toothed 'queen of Maya'
In an unlikely location in the archaeological site of Palenque - Mexico, the noble and mysterious Maya queen rests in a tomb full of treasures.
Biology
Viper but red-brown, how dangerous is this 'dark killer'?
Despite the name viper, this snake is not green, but has a very prominent color.
Science Events
Satellite captures scary image: 'Blood rain' may rain down on Western Europe
Disturbing images from the European Space Agency (ESA) satellite show a giant red ghost moving from the Sahara Desert, across the Atlantic Ocean, towards the Caribbean,…
Environment
Strangely the snow turns watermelon color and sweet like sugar in summer
During summer, some areas of ice and snow cover a light to dark red color, creating a fancy sight known as 'watermelon snow'.
Space science
Let's look forward to this weekend's lunar eclipse
You can watch a lunar eclipse that causes the Flowering Moon to turn red on May 15 or May 16, depending on your location.
History
Why did the old Chinese prostitutes always tie a red thread at the waist?
Feudal Chinese courtesans often tied a red thread at the waist. That strange thing hides many unexpected secrets that not everyone knows.
Space science
The truth about the controversial Mars-like red sky
Video recorded by locals from the port city of Zhoushan, China, shows the sky turning crimson under a thick layer of fog.
Animal world
Why can bloodworms, invertebrates, possess fearsome fangs like the sandworm in Dune?
Recently, scientists discovered the protein and process behind how bloodworms form their jaws.
Oceanography
The female angler pulls up a red and very long creature: A rare sea dragon, only 'rich people dare to eat'
This creature is about the size of a large eel.
Space science
3,000 years ago, the sky turned blue and red because of something that 'landed' from space
Legendary descriptions of a cosmic influence in ancient Chinese texts increased its value many times over, as it was the first scientific report of a geomagnetic storm.
Oceanography
Sea water suddenly turns red around the super volcano
The waters around the Campi Flegei supervolcano in Italy turn red, signaling increased activity below the water's surface.
Animal world
Millions of red crabs migrate to the Gulf of Cuba
Every year, millions of crabs emerge from the jungle in early spring and head towards Pigs Bay, crossing dangerous streets and highways to breed.
Conquer Mars
NASA's Mars robot turns its head when it encounters a 'crocodile back' rock
The rough rock with knife-sharp rocks on the red planet could threaten the Curiosity robot's wheels, forcing the vehicle to find another path.
Space science
The dying star unleashes mysterious circles
Astronomers have discovered that the red giant star V Hydrae is releasing strange smoke-like rings before exploding.