Have a carton of eggs that have passed their use-by date? Here's how to test to see if they are still good:
1. Fill a bowl with cold water and place your first egg inside. If the egg sinks to the bottom, it's fresh. If the egg sinks to the bottom, but stands on its point, it's still good but needs to be used soon. If the egg floats to the top, it needs to be discarded.
2. Repeat with the rest of the eggs in your carton.
Why This Works
Since egg shells are porous, overtime the liquid in the egg evaporates and is replaced by outside air. This results in more buoyant eggs.
Note: Always discard any eggs that have an odd appearance or odor.