BBC NEWS | Science/Nature | Map sheds light on hothouse world: "This is what the world may have looked like some 80 million years ago, at the time of the dinosaurs.
The climate was very hot, the Earth's ice sheets had melted, and sea levels were 170m (558ft) higher than today.
The estimates could help researchers model the effect on the seas of long-term climate changes, an Australian-led team reports in Science.
The Cretaceous period was even warmer than in current times, with shallow seas that flooded continents.
Dr Dietmar Muller of the University of Sydney, and colleagues, reconstructed the vanished ocean basins of the Cretaceous."
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