View full size image. New measurements of Neptune's atmosphere by a European space telescope suggest that a comet may have crashed into the gas giant about 200 years ago.
Beer brewed after a 13th-century recipe using gruit herbs. Gruit (alternately grut or gruyt) is an old-fashioned herb mixture used for bittering and flavoring beer, popular before the extensive use of hops. Gruit or grut ale may also refer to the beverage produced using gruit. Gruit was a combination of herbs, commonly including sweet gale (Myrica gale), mugwort (Artemisia vulgaris), yarrow (Achillea millefolium), ground ivy (Glechoma hederacea), horehound (Marrubium vulgare), and heather (Calluna vulgaris).
Guinness is a beer with relatively low carbon dioxide content. Low CO2 beers generally have gas added to them as they're released from the tap (called brewgas-a CO2 and nitrogen mix usually), which gives a thick, creamy head to the beer. The head is very important for flavor and texture of the beer.