All this week we’re talking with our friends from Scientific American about endings: in nature, culture and science. For most of human history the clearest, most black and white ending in our lives was death. However, in recent decades, life support technology has made death a gray area, leading to right-to-life debates, as in the case of Terri Schiavo. But the question of when someone is dead becomes especially important when dealing with the process of organ donation.

We asked you, our listeners: If you are are an organ donor, what made you agree to it? If not, what's your reason against it? Let us know in the comments or call 877-8-MY-TAKE and we'll play the responses on the air.