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"Instead of thinking of it as something we do by ourselves, how might we use technology where we are then able to share that with the person next to us?"

Wyatt Walker explained what he did by indicating that he made no apology for using such a tactic to reveal the racist brutality of the grim system of segregation to the whole nation.

"What we're doing by spreading the seawater on a large surface area. It's a bit like pouring a drink on the floor and allowing the CO2 to come out of the seawater really quickly."

But it is unclear exactly how, especially as machines and artificial intelligence increasingly take over work once done by humans.

"What caricaturists do by nature... is exaggerate the physicality. If a caricaturist is stopped from doing that, there's no point in him being a caricaturist," he says.