The Rise of the Vertebrates

Just wondering, why is there subtitles for some of these clips but not all? Love your content, btw. I think your channel's going to be big!

I like the details you add, they explain so much.

Do all animals have to lose nitrogen compounds? They (we) take in nitrogen compounds as amino acids. I heard that typical middle-class American people take in more than necessary, and piss away the excess. Even in chemical theory, could an animal recycle all nitrogen instead of taking some in and excreting some?

Do eggs need air since they can breathe? I wonder because turtles burry their eggs in the sand. Why don't they suffocate?

*waits for an official playlist to be made

How is this channel only 3.47k subscribers. I have no idea how it was suggested to me but this is REALLY good!

you are making great content, please keep it up!

Loving this series. It’ll take off!

Excellent!

Excited to see future series made!

Amazing series!

All the adaptations we see in birds began in Dinosaurs, and even in earlier Archeosaurs.
4 chambered heart, hollow bones, one-way respiration system, feathers, and endothermy are not unique to today's birds.