Why we explore space ?

In 1970, a Zambia based nun named Sister Mary Jucunda wrote to Dr Ernst Specifically, she asked how he could suggest spending billions of dollars on such a project at a time when so many children were starving on Earth.

Stuhlinger soon sent the following letter of explanation to Sister Jucunda, along with a copy of “Earthrise,” the iconic photograph of Earth taken in 1968 by astronaut William Anders, from the Moon (also embedded in the transcript). His thoughtful reply was later published by NASA, and titled, “Why Explore Space?"

Here's what he reply to her : https://lettersofnote.com/2012/08/06/why-explore-space/