Una madrepora della specie Dipsastraea favus, fotografata nel parco nazionale di Ras Muhammad, in Egitto. In questa colonia massiccia (tipica del genere Dipsastraea), di forma sferica, ciascun corallite è disposto sulla superficie della colonia ed ha pareti proprie, separate da quelle dei coralliti adiacenti. I polipi si estendono solo di notte e non sono visibili nell'immagine.
English: Coral (Favia favus), Ras Muhammad National Park, Red Sea, Egypt. This species of stony corals is massive and forms thickly encrusting dome-shaped colonial corals. There is a great diversity of form even among the same species. The corallites project slightly above the surface of the coral and each has its own wall. The septa and costae linked to the corallite wall are well developed and covered by fine teeth. The polyps only extend and feed during the night. Each one has a small number of tapering tentacles which often have a darker coloured tip; these are called stinger tentacles, or sweeper tentacles. They use these to sweep the water to see if any other coral is in its area; if so, then they begin to sting the other coral. This is commonly known as coral war. Each coral is trying to make sure it has enough room around it so it can continue to grow and have more surface area for its offspring.
Português: Madrépora da espécie Dipsastraea favus, fotografada no Parque Nacional Ras Muhammad, no Egito. Nesta colônia maciça (típica do gênero Dipsastraea), de forma esférica, cada coralito, o exoesqueleto individual, está disposto na superfície da colônia e tem suas próprias paredes, separadas das dos coralitos adjacentes. Os pólipos se estendem somente à noite e não são visíveis nesta imagem.
English: Northwest view up to the pediment, rotunda, and dome of the California State Capitol in Sacramento. California was admitted as the 31st state of the Union 175 years ago today.
Deutsch: Blick von Nordwesten auf Frontispiz, Rotunde und Kuppel des California State Capitol in Sacramento. Heute vor 175 Jahren wurde Kalifornien als 31. Bundesstaat in die USA aufgenommen.
Polski: Widok z północnego zachodu na fronton, rotundę i kopułę Kapitolu Stanu Kalifornia w Sacramento. Dziś, 175 lat temu, Kalifornia została przyjęta jako 31. stan Unii.
Polski: Widok przez jezioro Siskiyou w północnej Kalifornii na stratowulkan Mount Shasta. Mierząca 4317 m n.p.m. Mount Shasta jest drugą najwyższą górą w Górach Kaskadowych.
Panorama di Sorano, in Toscana. Il borgo sorge su una rupe di tufo (379 m s.l.m.) ed è osservato da ovest, dall'insediamento rupestre di San Rocco, nell'ora blu.
English: View towards Sorano - taken from San Rocco viewpoint (W of Sorano) during blue hour.
Italiano: Panorama di Sorano, in Toscana. Il borgo sorge su una rupe di tufo (379 m s.l.m.) ed è osservato da ovest, dall'insediamento rupestre di San Rocco, nell'ora blu.
English: Haigerloch, Germany: view of the old town with its picturesque location in a bend of the Eyach river. In the centre Haigerloch Castle and the castle church.
Nederlands: Dit beeld, dat de apostel en schrijver van Evangelie volgens Matteüs voorstelt, staat in de St. Genesiuskerk in Baden-Württemberg. Vandaag is het de feestdag van Matteüs.
English: The Isaiah Scroll is the best preserved of the seven Dead Sea Scrolls that were first discovered by Bedouin shepherds from Qumran. The Dead Sea Scrolls were first made available to the public on this date in 1991.
English: Panoramic view of the west bank of Nigeen Lake in Srinagar, India, with the distant Middle Himalayan Pir Panjal mountain range in the background. The city, situated on the banks of the Jhelum river and several lakes in the Himalayan Kashmir Valley, is the summer capital of Jammu and Kashmir and the northernmost million-plus city of India.
English: French chemist and microbiologist Louis Pasteur photographed by Nadar. Renowned for his scientific discoveries, he saved millions by developping vaccines for rabies and anthrax, as well as the process of pasteurization. He died on this day 130 years ago.
Français: Le chimiste et microbiologiste Louis Pasteur photographié par Nadar. Célèbre pour ses découvertes scientifiques, il sauva des millions de vies en développant un vaccin contre la rage et la maladie du charbon, ainsi que le processus de la pasteurisation. Il est mort ce jour, il y a 130 ans.
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