• mass & spin of the merged BH matches the Kerr spectrum
• horizon area of the final BH is greater than the sum of the horizon areas for the merging BHs, as predicted in 1971 by Stephen Hawking go.aps.org/4nkqZEr
• mass & spin of the merged BH matches the Kerr spectrum
• horizon area of the final BH is greater than the sum of the horizon areas for the merging BHs, as predicted in 1971 by Stephen Hawking go.aps.org/4nkqZEr