Weird Ways to Search for ET

It's a constant battle, as SETI scientists (and string theorists, for that matter) are often accused of falling down the wrong rabbit hole. "Why waste time looking for old-style radio signals," many people have written me, "when the aliens will be shooting neutrinos our way?" "The aliens will use entangled particles to signal us," many tell me. Luc Arnold, a French astronomer, has suggested that aliens might signal us with giant shadow puppets. Read More