I'm asking you for an explanation of your assertion, not questions and a restatement of your assertion. High school science class tells us that birds and butterflies are very light, and have wings that provide lift and thrust. What is your explanation for them using "density"? If you're trying to be effective in revealing a hidden truth you need to work harder at it, or why even bother.
I'm asking you for an explanation of your assertion, not questions and a restatement of your assertion. High school science class tells us that birds and butterflies are very light, and have wings that provide lift and thrust. What is your explanation for them using "density"? If you're trying to be effective in revealing a hidden truth you need to work harder at it, or why even bother.