The unit has a built-in battery that lasts up to 20 hours in normal MP3 mode and that recharges automatically when connected to a computer's U.S.B. port.
Young worms whose calories were restricted had normal short-term memories, but their long-term memories were severely impaired; the memories faded within 24 hours, as opposed to 40 hours in normal worms.
At the top speed limit of 75 miles an hour, the 147-mile journey through the wheat fields, cork forests and olive groves of the Alentejo region now takes just a little over two hours in normal traffic on the mostly straight four-lane highway.
A conservative estimate based on a person who spends eight hours a day sleeping and 16 hours in normal activities, but one who does not add to the atmospheric burden by exercise, would thus come to about 456 liters of carbon dioxide a day, or 166,440 liters every 365 days.
In contrast, the strain of young worms with reduced activity in their insulin-signaling pathways had longer short-term memories -- lasting about six hours, or three times as long as in normal worms -- and long-term memories that lasted far longer than the 40 hours in normal worms.
Its built-in rechargeable battery delivers four to five hours in normal use and can be recharged using the built-in USB connector.
