Random topic thread - for random short topics not worth a new thread

This thread is intended for random thoughts or random topics that aren't worth it to start new threads. Japanese fighting bugs.As a former arachnid collector, I find this both interesting and wasteful at the same time. What I wouldn't give to have these creatures again. Anyway, these videos settle some of the most asked questions in the arachnid/bug collecting hobby: who would win if we put creature A and creature B into the same cage?Enjoy!

Isn't that the same mentality that makes teenagers taunt wild animals in zoos?Anyway, my short topic...Students, newly graduated in the biological sciences from a top US university, were presented with a big log (as in chunk of tree trunk). They were asked where the majority of its mass came from. The vast most of them got the answer wrong. Anyone care to supply the answer?

If it is a question of what contributes most to the mass I'd go with Hydroxilic Acid

H₂O

If it is a question of where most to the mass came from (air, ground, etc) I'd go with

bacteria scat

Enjoy.

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Just to be clear, I used to be an arachnid collector not because I wanted to see them fight each other but because I wanted to observe their behaviors. I had close to 100 arachnids of many species at one point.What I meant was I'd love to have those creatures as pets rather than entertainment like that. But you have to admit, those "matches" answered a lot of questions that we have about who would win in a death match.