Headstone of Humanity


There are a number of ways that humans could send information to intelligent beings throughout the galaxy. We could control the pulse rate of a Gamma-Ray burst to have it go off once every pi seconds. We could partially block the light of our sun in a specific way, or use light in some other way. Light is useful becauseful it travels very far very quickly. We could try radio waves, though those may be too limited in range to be of use

Gamma Ray Image

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