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yaosio t1_j4dmzhi wrote

Reply to comment by Deathbeddit in Scientists Have Reached a Key Milestone in Learning How to Reverse Aging | Time by johnwayne2413

Because they need to control everything that happens to the mice. If you start with old mice a lot could have happened in their short lives. Even if they lived in a lab records could be neglected.

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pittaxx t1_j4fncvi wrote

Mouse lifespan is 6 months to 2 years (wild vs perfect conditions). If you are doing research like this, you could age them up naturally yourself and have full records. Heck, you could even do most experiments on artificially aged mice and then use a smaller group of naturally and mice to confirm the results.

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