Is there any scientific basis for smelling incense?

There is no meaning and so-called omen.

The principle of seeing incense is that some ill-intentioned fortune tellers, so-called wizards, godlike witches, fake monks and fake Taoist priests deliberately fabricate a series of theories about God and God, so that you are willing to pay them to help solve them.

So, honey, it's not interesting. By accident. This phenomenon you are talking about is superstition, which is collectively called "looking at the head of incense", that is, judging whether it is good or bad according to the different forms of incense burning, or what happened during incense burning, is actually not allowed. The length of burning incense is related to the quality, material, compactness, wind, oxygen distribution uniformity, ignition time, etc., but it doesn't mean anything, and the gods won't pass it. When an ordinary person dies, the intensity of the soul can only hold a dream at most, and it cannot change the length of burning incense. Remember, faith is completely different from superstition and folk custom.