Why do some leftovers get better with age, and others get worse? 𝗧𝗵𝗲 𝘀𝗰𝗶𝗲𝗻𝘁𝗶𝗳𝗶𝗰 𝗻𝗶𝘁𝘁𝘆-𝗴𝗿𝗶𝘁𝘁𝘆: ...