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Yes, Christer Fuglesang is the one and only (swedish atleast) space traveller.
Travellers, migrants, nomads,
Plants cannot communicate with one another.
Cells in the body communicate with one another via signal transduction pathways. A cell needs to communicate with other cells to survive.
Electronically.
They communicate with each other by touching their antennae with one another. If red ants come upon another ant they do so to tell if they are from the same nest.
We communicate using sound waves by talking and listening to one another!
talking
morse code.
they grunt to communicate
They used smoke signals to communicate with one another.
a wolf communicates with one another with it's spine tingling howl