The question might arise in your mind too that how ice preserves all these millions of years old objects altogether. Well, the freezing cold blocks the bacterias and different decomposers. Especially chilled places like Arctic and Antartica are low on oxygen, this prevents the decomposers from functioning. Even if the decomposers work, it’s at a much lower rate than any warmer place. That’s how scientists get lucky to discover all these well-preserved objects.