Nikolai

We can taste it. Put one more couple of slit in front of screen. If wave will extinguished in the first slits as a result of observation, i think electron will generate waves again.

I have idea. Electron moving creates a wave that accompanies the particle all the way, but by observing the electron wave is extinguished and only a particle reaches the screen. Perhaps in some experiments, the scientists recorded particles and in others only their wave? Hence, the wave-particle duality.