human
Now, Farid said,
gpt
You will note that these peaks occur at intervals, with the spacing apparently random. The main sequence of noise out of which the peaks rise is the 21-centimeter hydrogen line. Notice also that the peaks have nearly identical amplitudes. Obviously, the source is neutral hydrogen, which is to say hydrogen in its normal form, not ionized as we find it in plasma in a star's atmosphere. Our problem is simply to locate the source of the peaks. Somewhere in the circuit there seems to be an effect that serves to modulate the incoming signal. Our antenna will be useless unless we eliminate this interference so that the signal can be pure once again.