This is an image of a bloop, an ultra-low frequency sound that could be heard from 5,000 kilometers away. On the y-axis is the frequency of the sound, on the x-axis, time. The brighter, or more yellow the image, the louder the sound. This bloop in particular is so loud, that researchers have claimed that "not even a blue whale is large enough to croon this loud." Bloops are sounds emanating from the deepest parts of the ocean, parts we, as humans, haven't been able to explore yet. This visual is interesting to me because it's always interesting to find evidence of potential lifeforms and because this visual, while not visually appealing, can convey so much about the sound and pitch of a particular bloop.