I have a mosquito in my story who is suspended in amber. The chunk of amber it is encased in eventually finds itself drifting through deep space without any sort of human-sourced protection (long story). After millions of years, aliens find the mosquito in its chunk of amber and remove it, finding that the mosquito’s biology is intact (though it’s definitely dead).
Could the mosquito “survive” for this long? The biggest problem I see is temperature- even if very low temperatures don’t damage the mosquito, the heat of any nearby sun might melt the amber (and the bug).