How can it be that there exists not a single example of a working wheel in nature, which after all gave us (among other things) the eyeball?
If we can't use all of our brain's potential, why does that potential exist? [more inside]
What experiments have been carried out where animals perform better than us at particular cognitive tasks? [more inside]
Why did consciousness evolve? [more inside]
Are there any animals that have evolved a use for radioactivity? If so, what ways is it used? If not, why has this not happened? [more inside]