But the decline is a lot bumpier than the rise: the pH difference from one year to the next is frequently greater than the change in average pH levels over 20 years.

ECONOMIST: Ocean acidification

Some, including Dr Riebesell, suspect that these physical and chemical effects of warming may prove a greater driver of productivity change in the ocean than altered pH.

ECONOMIST: Ocean acidification

There is a whole hook-up here from the laptop and into a separate box created by Rayne(ph), which then runs into your mixer, and you change your songs through your laptop.

NPR: Hi-Tech DJ's Trade Discs for Laptops

Listening to the same kind of music from the same band can be repetitive, but most podcasts change their content frequently, which keeps you engaged, says Paul Atchley, Ph.

MSN: Marathon commuters still find time for TV