In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats more slowly, requiring less oxygen, and its arteries become constricted.
Our best chance of arresting runaway climate change, says Hansen, is to rule out new coal plants unless all of their emissions are captured and buried.
All these places are suspected "reservoirs" where HIV can hide out for years, to rebound in patients who stop taking drugs that suppress the infection.
The cashflow from tenants is more stable than that from equities, where values zigzag day by day and dividends can suddenly be suspended by the management.
Some scholars conclude that a government with finite resources should simply stop paying for medical care that sustains life beyond a certain age—say 83 or so.