The conversation turns to the mechanics of ocean impacts from space objects. Bryant explains that a rock just over half a mile in diameter hitting the Pacific would vaporize billions of tons of water at 5,000 degrees Celsius, generating a forward-moving steam blast capable of incinerating forests, followed by tsunami waves reaching 30 feet or more at distant coastlines. The vaporized water would then return as unprecedented rainfall events, evidence of which Bryant believes he has found in anomalously wide ancient waterfall channels in Australia's Northern Territory.
Art reads breaking news that India plans military action in Kashmir within two weeks, and Bryant provides atmospheric analysis of what a nuclear exchange would mean for global fallout patterns. He notes that the 1963 nuclear testing period left a detectable cooling signature in global temperature records, and explains how monsoon circulation and jet stream patterns would carry radiation from South Asia primarily through China and Japan before crossing the Pacific.
Key Moments
Everest's ice fields retreat six kilometers: Art reads a UN-backed expedition report from High Island Peak near Everest: the 1953 Hillary-Tenzing base camp once stepped straight onto ice; today climbers must walk more than two hours to reach it, and small ponds have grown into a two-kilometer-long lake.
Bryant stumbles onto Australia's mega-tsunami evidence: Geomorphologist Ted Bryant describes the field puzzle that started his tsunami work: angular boulders fallen from a cliff and jammed two meters above sea level into a sheltered crevice that ordinary storm waves could not have produced, leading him to realize multiple events had hit the Australian coast.
Hawaii's Great Crack and the Canary Islands flank failures: Bryant explains that volcanic islands like Hawaii and the Canaries are unstable edifices built on rubble. Hawaii's Great Crack threatens to slide a quarter of the Big Island into the Pacific, fortunately aimed at Australia, while past Canary Islands collapses have launched landslides directly toward North America.
Ocean impact: 5,000 C steam wall reaches mid-state New York in 8 seconds: Bryant walks through what a kilometer-class meteorite striking the Pacific would do: vaporize billions of tons of seawater into 5,000 C steam, generate a 10-meter Pacific-wide tsunami, and propel a vapor wall from offshore Long Island into mid-state New York in eight seconds, incinerating forests before the wave arrives.
Civilization-killing impacts every million years: Bryant tells Art that over geological time an object large enough to perturb the atmosphere and trigger an ocean-wide tsunami arrives roughly once every million years, undercutting the modern assumption that such events are vanishingly rare.