The 19th-century physicist Michael Faraday was known not only for his seminal experimental contributions to electromagnetism but also for his public speaking. His annual Christmas lectures at the ...

Casting a swirling shadow, a glowing candle flame sways eerily before flaring up once more. As ghostly as it looks, this flame dance is not the result of any force—paranormal or otherwise—but rather ...

A flame in low gravity either wouldn’t exist or would be spherical, according to our readers. And it would be a different colour to flames on Earth too A candle flame isn’t a thing, but a process.