How on Earth did we start using “once in a blue moon”?
The moon does turn "blue" sometimes, but this idiom doesn't really refer to its color.
Tag: red
NASA finds new exoplanet that orbits three different suns
The planet is so close to its host star that it only has a 5.36 day-long orbit. At this distance, ...
Tanzania’s blood-red lake snapped from space by NASA
Pretty. And pretty deadly.
Immortal cells could usher in the age of plentiful, artificial blood for transfusions
Your body probably won't even tell the difference.
Why is Mars so red?
It's because of all that iron-rich dust, but it's not clear how it got there.
Scientists may have seen a black hole being born for the first time ever
Awww, it has your....mass.
The colour red increases speed and strength of reactions
What can possibly link together speed, strength, and the colour red ? Nope, it's not a brand new Ferrari - ...
The best view so far of the Jupiter red spot
I've seen a whole lot of pictures of the red giant spot (it's about as big as Earth), but this ...