The series, “Cosmos: A Space-Time Odyssey” is a reboot of the 1980 Carl Sagan classic, “Cosmos: A Personal Voyage.”

Sagan was a brilliant astronomer who suffered from myelodysplasia, and ultimately succumbed to pneumonia in 1996.

Astrophysicist and host of the reboot, Neil deGrasse Tyson, credits Sagan with being a mentor responsible in part for where he is today.

Not long before Sagan died, he recorded a message intended for the future settlers of Mars. You can listen to that message right here:

Audio Player

The message is haunting and such a fitting listen after tonight’s episode of “Cosmos,” which dealt with the idea of “ghosts” and bringing the past to you.

The audio is taken from The Carl Sagan Portal. You can read more about him and his work there.

If you have the time, this video of Carl Sagan, Stephen Hawking, and Arthur C. Clarke in God, the Universe and Everything Else.