Cloning is well and good if you want to create new beings.
Those that are open-minded and curious may be able to find these tunnels, and pop in for a visit.
The Sassani are particularly common across the cosmos and are believed to be of the alien races in contact with earth.
They come to Earth to pick up a juicy selection then take it home to do cosmos-only-knows what.
The street bursts into frenetic activity -- shouts, calls, men running wildly, wooden racks and trays being gathered and squirreled away into the some recess between buildings.
Tall and humanoid with a long head, and distinctive grey features; They are the most commonly depicted alien life-form in our media.