The blue nail theory has been a topic of conversation on TikTok, but what exactly is it? Ahead, an expert explains.

In 1831, a massive volcanic eruption cooled the Earth’s atmosphere by 1 degree Celsius and even caused the Sun to appear in varying shades of purple, green, and even blue due to excess sulfur dioxide ...

I'm a little late to news of this interesting sounding book dedicated to the use of blue paper in Italy entitled Venice in ...