Why Flames Always Point Upwards (Except in Space)

The video explains why a candle flame points upwards, attributing it to the properties of hot air, which is less dense than cold air, causing it to rise. This is similar to how a helium balloon rises. The video also explores how gravity affects flame behavior, showing that in microgravity, such as on the International Space Station, flames do not point upwards but form a sphere due to the absence of gravity's pull.

Why does a helium balloon rise while a normal air balloon does not?

What happens to a flame in the absence of gravity, such as in space?