4.

The very last frog on planet Earth was squashed, unintentionally, by Ms. Sarah Lee Blake, 3 yrs old, on a warm Saturday afternoon, overlooking the flooded ruins of New York. Ms. Sarah Lee would remain unaware of her role in the extinction, beyond a yucky smear she found on the bottom of her sneaker some time later.

She herself would live a long life, through interesting times, indeed.