Floris van Breugel / Sunrise over the impressive Palisades view from Mount Agassiz, John Muir Wilderness, the two most prominent peaks are Mount Sill and North Palisade, below which lies the Palisade Glacier. California,...

Stephen Dalton / Mottled Umber (Erannis defoliaria) on window sill. UK, December.

Stephen Dalton / December Moth (Poecilocampa populi) on window sill. UK, December.

Bryan and Cherry Alexander / Kittiwakes (Rissa tridactyla) nesting on a window sill in the Russian coal mining town of Barentsburg, Spitsbergen, Norway, June 2006.

Oriol Alamany / Domestic cat (Felis catus) sitting on window-sill, next to plants with an American flag, Saint Paul Island, Pribilof Islands, Alaska, USA

Konrad Wothe / Little Owl (Athene noctua) on window sill, Greece

Rick Tomlinson / Monohull "Sill Beurre Le Gall", skippered by French sailor Roland Jourdain during the Europe 1 Star, 2000.^^^ The monohull finished 7th, crossing the Atlantic in 15d 13h 38m.

Rick Tomlinson / Monohull "Sill Beurre Le Gall", skippered by French sailor Roland Jourdain during the Europe 1 Star, 2000. ^^^ The monohull finished 7th, crossing the Atlantic in 15d 13h 38m.