ELI5: Why haven't we invented a better way to clean teeth than brushing/flossing?
ELI5: What is file compression and how does it work?
ELI5: Why is it that sometimes even after sleeping for a decent amount of hours, i still wake up feeling exhausted?
ELI5: How is the lethality of a substance determined in an ethical way?
I recently saw a documentary and learned that the most venomous snake on earth (the Inland Taipan) can kill over 100 grown humans with its venom.
How is that figure determined? I know that it is not likely that some scientist tried to try and kill as many people as possible. So how is it done? How do we tell if something is lethal? And how do we tell how many people it can kill?
What about a completely foreign substance? The effects of which on humans is relatively undocumented?
ELI5: Why does gasoline reflect in a rainbow effect instead of one colour?
ELI5: Why can gas prices be so different between two stations?
ELI5: Why can't necrosis kill tumors?
ELI5: Does Ginger Ale and Saltines really help an upset stomach?
ELI5: Why does it feel good to rub your eyes when you’re tired?
ELI5: Why does a knee give out for a second when you walk sometimes?