... climate changes (Niles Eldredge, 2001). In total, nineteen percent of families at that time were wiped out from the face of the Earth (Niles Eldredge, 2001). In the third wave of extinction, around 245 years ago (Niles Eldredge, 2001), eighty and ninety-six percent of all marine species during that period were lost (Tim Radford, 2001). In total, fifty-four percent of families were lost (Niles Eldredge, 2001). This is the greatest mass extinction event since. The causes were first thought to be due to complex amalgams of climate change (Niles Eldredge, 2001). However, researchers recently suggested from evidences from fossil records that the extinction of families at that time might be due to a bolide's impact (Niles Eldredge, 2001). In the fourth wave of extinction, approximately 210 million years ago, when dinosaurs and mammals first evolved, twenty three percent of families existing at that time went extinct (Niles Eldredge, 2001). In the fifth ...

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