Kind of unrelated, but Ultra Wideband [0] is a way to communicate with quick electromagnetic pulses over big parts of the EM spectrum, which is indistinguishable from noise [1]. We could just be the only beings stupid&#x2F;unlucky enough to make all our radio communication so obvious.<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ultra-wideband" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ultra-wideband</a><p>[1] [pdf] <a href="https:&#x2F;&#x2F;www.researchgate.net&#x2F;file.PostFileLoader.html?id=5320a8d3d039b1fe0a8b465d&amp;assetKey=AS%3A272534530920451%401441988703268" rel="nofollow">https:&#x2F;&#x2F;www.researchgate.net&#x2F;file.PostFileLoader.html?id=532...</a>