The medical team started Sara on intravenous antibiotics and high-flow oxygen through a mask.

NEWYORKER: Letting Go

To digress for a moment, it was biologist Felix Meerson who showed that high-altitude chambers where oxygen supply is limited, triggers an adaptive response that produces humans with profound mental capabilities and resistance against disease.

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The risk here is that as Huawei and ZTE continue their assault on low-end smartphone market, the arrival of iPhone 4S will suck the oxygen out of the high-end smartphone segment, triggering order cancellations from Samsung, Nokia, LG, Sony Ericsson and HTC.

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Susan Block and her father had the conversation that we all need to have when the chemotherapy stops working, when we start needing oxygen at home, when we face high-risk surgery, when the liver failure keeps progressing, when we become unable to dress ourselves.

NEWYORKER: Letting Go

Some neonatal intensive-care units (NICUs) are cutting back on the high levels of oxygen traditionally given to premature babies.

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Liquid-fuelled rocket engines work by mixing the fuel (in this case kerosene) with liquid oxygen at high pressure.

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