There's nothing quite like being a quarter-million miles away to bring fresh perspective on the need to do more to safeguard our little planet.

The Artemis II crew was the latest group of spacefarers to discover that on their journey to the moon and back earlier this month. Jeremy Hansen, a mission specialist from Canada and one of four astronauts aboard the Orion craft, described the experience as "another level of amazing."

Postflight comments by Hansen and Americans Reid Wiseman, Christina Koch and Victor Glover echoed reactions from an earlier generation of moon-bound astronauts known now as the "overview effect," coined by science author and philosopher Frank White to describe how humans' perspective of Earth changes when they have a chance to view it against the backdrop of the cosmos. When they have a chance, in other words, to see our marvelously blue marble set against what looks like an endless expanse of dark. Actor William Shatner of "Star Trek" fame, who participated in a........

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