Sat Aug 24 2019
We came to Earth, in your timeline, and if you blinked you missed us!
By now the temporary wormhole has collapsed, and you are (or are not) bereft of our sweet mementos of Earh.
We, on the other hand, are far gone. Zipping across the galaxy to seed it with Terran imprints.
Look after the little birdies we gave you, and let the elephants trample free.
Till we meet again!