A tiny amount would fuel the main engine of the space shuttle. "We have an equivalent amount of energy in just one gram or about a raisin-size worth of antimatter," said George Schmidt ...

Instead of the nine-and-a-half years NASA’s New Horizons probe took to reach Pluto, an antimatter engine could get us ... and no experimental work has been conducted yet,” they write.

But this process doesn’t work like a Tupperware container, where you can just collect antimatter particles until you have enough to build an engine. “[S]toring solid or liquid antimatter in ...