But that's nothing new, Dick.
Once upon a time there was a flying ship called Zeppelin, it carried lots of people, weighted hundreds of kilos, was controllable and still it was lighter than the air - yes it was!
Now, how can you conceive a plane weighting just 1/100 of a gram and being heavier than the air, is just beyond my wildest imagination.
But why don't you make us a surprise? - show us one