The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesn't need its brain anymore so it eats it!

Words have a genealogy and it's easier to trace the evolution of a single word than the evolution of a language.

The problem is that no ethical system has ever achieved consensus. Ethical systems are completely unlike mathematics or science. This is a source of concern.

Cost is always an object - the second law of thermodynamics sees to that

The only answer to the endless chains of why, why, why is that the alternatives died

We should get used to the idea that we'll probably never be able to find - and confirm - a good explanation of the ultimate origin of the universe, though I see no reason to believe that we can't press much further on this question than we have managed to date.

I am a philosopher, not a scientist, and we philosophers are better at questions than answers.