They expected to find a high metal content among the larger particles - PM10s and PM 2.5s, but it surprised them to find such high levels in even the very smallest ones.

BBC: Railway tracks

In the morning, you'll awake to your own rhythm with a gourmet, in-room breakfast and 2 pm checkout.

BBC: Daily deal: An opulent opus in downtown Vancouver

The free, two-day event runs from 2 pm to 6 pm on 17 and 18 August.

BBC: Matinee jazz in a Manhattan parlour

The result: a huge, 2-page centerfold story on Monk in PM.

NPR: Excerpt: 'Alive at the Village Vanguard'

Gold still down by 2:36 PM in New York, while the yield on 10-year Treasuries rose to 1.77%.

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The U.S. Environmental Protection Agency (EPA) has developed a formula to convert PM 2.5 readings into an AQI value that can help guide health-related decisions.

FORBES: Air Quality In China

Two-thirds of the work is done on the latter shift, between 10 PM and 2 AM.

ENGADGET: Inside UPS' Worldport: How a shipping titan moves 2,000 packages every 17 seconds

Yield on benchmark 10-year Treasuries gained 1.5% to 3.32% by 2:37 PM In New York.

FORBES: The Negative Effects Of The Treasury's Plan To Sell $142B Worth Of MBS