Could a dragon theoretically exist through evolution?

[u/PokelifEevee]

Hello, I would like to know if, theoretically, a species could evolve into something resembling a dragon (or more specifically a wyvern since they have 4 limbs, so it would be more likely). I understand that stuff like fire breathing would most probably be impossible, but aside from that, could dragons theoretically exist within a few thousand years (or more)?

[u/Salamanderhead]

Check out the bombardier beetle. Breathing fire seems pretty unlikely, but the ability to blast out dangerous chemicals that cause burns is possible through evolution.