Humans are strongly biased toward vision as their primary sense for exploring the universe.

“I mean, look, uh so much that we are incredibly biased towards vision, right? As as like humans, it's our our primary sense. This is the This is the way that we explore.”

Everything currently visible is perceived as it appeared in the past because light requires time to travel from the source to the observer.

“It gives you a sense of how Goodness gracious, like everything we see we're seeing in the past. We only have one way to look, and it's a go.”

In an expanding universe, photons lose energy over time as their wavelength is stretched by the expansion of space.

“we live in an expanding universe and in an expanding universe the photon which also can be thought of as having a wavelength of light as it moves through an expanding universe that wavelength gets stretched embedded in the fabric of the stretching universe itself and when you stretch light you give ”