Liquid drop. So it fell off the tip of the pipette and flies down - what shape does it take? How does a stationary drop and a drop that is blown by a stream of air evaporate? And how, and why is a drop formed at all? The answers to seemingly simple questions are actually not so simple. The blob is always in motion, in the dynamics of birth and extinction: flight, wobble, decay, evaporation and condensation, an endless chain of transformations, shapes and sizes. Therefore, a drop can be called a crossroads at which the interests of different scientific disciplines converge - from hydrodynamics to chemistry. For a wide range of readers.