Can anyone tell me how old this bird is. We found it outside.

Twin boys have girlfriends one of the couples have a baby would the dna of the lil baby be the same as the couples dna bc the boys are identical twins

What's the waste product of electrons and pyruvate combining in fermentation?  

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.