Sources -

Why Do We Dream?:
https://www.verywellmind.com/why-do-we-dream-top-dream-theories-2795931

How much of the Ocean has been explored?:
https://oceanliteracy.unesco.org/ocean-exploration/

Fermi Paradox: Where are the aliens?:
https://www.space.com/25325-fermi-paradox.html

Why We Sleep: A Hypothesis for an Ultimate or Evolutionary Origin for Sleep and Other Physiological Rhythms:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7120898/

Dark Energy, Dark Matter:
https://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy