Rainbows at night exist. These rainbows are called moonbows and they only occur when there is a source of water near a full moon. If the moon is in any other phase, the light will not be enough to cause a moonbow.
100 Mind-Blowing Phase Facts
Though there has been research to develop AI that could detect depression from someone’s voice, it’s still not very accurate and tends to misdiagnose ethnicities that weren’t the majority in the group used for the ML development phase.