All the important parts, wherever they are! Who really cares anyway we’re only here for two in particular: the iris and the retina. The retinal blind spot.
And intelligent design. Are wrong. Reaching conclusions and working backwards for fun and profit. Young Earth creationism. Dan’s religious upbringing. Irreducible complexity. Faulty reasoning.
The evolution of the modern vertebrate eyeball
Fish and their goofy eyeball arrangements. The crazy Charlie eyeball progress chart. Light sensitive flat patches, pits, enclosures, open pinhole eyeballs, lenses, and flexing your sphincters. Dan’s episode on Three-D Vision.
Comparative eyeball studies
Human eyes are pretty sweet! But there other ones that do other things (at their own local summits on Mount Improbable) and are also really good at stuff! Goats, sharks, snakes (sorta), bees. Removing your lenses for fun and profit. Monet’s lens removal and ultraviolet perception.
Common “colorblindness” is a misnomer, but “color discernment syndrome” doesn’t flow as well. Retinal wiring and the “blind spot.” Saccades. “Chronostasis” or “the stopped clock illusion” and the tight coupling of our eyes and our brains.
Selecting scanning sites for statistical uniqueness and natural resistance to hacking. The insufficiency of fingerprints. Iris scans. Retinal scans. Bio-identification security. Ease of use.
Rationalism/spiritualism/etc. The rational scientific worldview and self-correction. The absolution of new knowledge.
Love! For James Cameron and Aliens. And the great utilitarian design of the spaceship interiors. Great world-building.
Cryosleep? Ice sublimation and mummified Sigourney Weaver. Hibernation. How to shove pine cones up your butt, chug some Nyquil, and turn into a bear. Cryogenic specimen preservations: sperm! DIY fecal plugs for hibernation.
Private space industry
The rise of private space industry. Going dystopian.
Planet? Moon? The delineation between planets and moons and looking forward to the future when we get confused again. Demoting Pluto to planetoid. Terraforming Mars. Sad news on Martian CO2 supplies for atmosphere creation. Crater settlements and whether or not you need a roof. Atmospheric density limits for human comfort and thriving.