We worked out what it would take to wipe out all life on a planet – and it's good news for alien hunters The first exoplanet was spotted in 1988. Since then more than 3,000 planets have been found outside our solar system, and it’s thought that around 20% of Sun-like stars have an Earth-like planet in their habitable zones. We don’t yet know if any of these host life – and we don’t know how life begins. But even if life does begin, would it survive? Earth has undergone at least five mass extinctions in its history. It’s long been thought that an asteroid impact ended the dinosaurs. To establish a benchmark for this, we’ve been studying what is arguably the world’s hardiest species, the tardigrade, also known as the “water bear” for its appearance. Last survivors They live all over the planet but can survive far below the ocean’s surface, around volcanic vents at the bottom of the Mariana Trench happily oblivious to the life and death of surface-dwelling mammals. We wanted to consider what cataclysmic events might be able to finally kill off the hardy tardigrade. Apocalypse never
Oldest people This is a list of tables of the oldest people in the world in ordinal ranks. To avoid including false or unconfirmed claims of extreme old age, names here are restricted to those of supercentenarians (aged over 110 years old) whose ages have been validated by an international body that specifically deals in longevity research, such as the Gerontology Research Group (GRG) or Guinness World Records (GWR), and others who have otherwise been reliably sourced. According to this criterion, the longest human lifespan is that of Jeanne Calment of France (1875–1997), who lived to the age of 122 years, 164 days. As women live longer than men on average, combined records for both sexes are dominated by women. Since the death of 116-year-old Susannah Mushatt Jones of the United States on 13 May 2016,[a] Emma Morano of Italy, born 29 November 1899, is the oldest living person in the world whose age has been documented. Ten oldest verified cases ever Men a^ Mortensen was a native of Denmark. Notes
What can cavefish teach us about the world? During the Age of Enlightenment’s scientific revolution, naturalists went out into the world in large numbers to take a census of the earth’s flora and fauna: collecting different plants and animals, identifying the ones never before seen, and naming and classifying them according to the taxonomy system devised by Carl Linnaeus. Centuries later, Louisiana State University marine biology professor and Senior TED Fellow Prosanta Chakrabarty (TED Talk: Clues to prehistoric times, found in blind cavefish) is continuing the search for new species — of marine and freshwater fish, in his case — by traveling to bodies of water and swimming, trawling and diving through them to catch and examine specimens by hand. But thanks to 21st-century technology and knowledge, he’s able to do much more than just name them — he can evaluate a fish right down to its genes and use this information to find its relatives, redraw the Tree of Life, and learn more about our planet’s geological history.
egyptian neters system 1920 × 1080 - youtube.com 350 × 655 - ajendu.blogspot.com 236 × 365 - pinterest.com 564 × 570 - pinterest.com 1148 × 812 - egyptianmysteries.org 2567 × 3871 - en.wikipedia.org Deep-Sea Skates Incubate Eggs Near Hydrothermal Vents Jump to Navigation Photos & Video Ship Location San Pedro, USA Deep-Sea Skates Incubate Eggs Near Hydrothermal Vents | Nautilus Live In June 2015, a team of researchers aboard E/V Nautilus made a surprising discovery while exploring the seafloor northwest of the Galapagos Islands. Share this Expedition Partners The Nautilus Exploration Program is funded by these major partners.
The Seven-Day Week and the Meanings of the Names of the Days The Seven Day WeekThe Naming of the DaysSunday -- Sun's dayMonday -- Moon's dayTuesday -- Tiu's dayWednesday -- Woden's dayThursday -- Thor's dayFriday -- Freya's daySaturday -- Saturn's daySourcesSee Also The Seven-Day Week The Babylonians marked time with lunar months. They proscribed some activities during several days of the month, particularly the first -- the first visible crecent, seventh -- the waxing half moon, fourteenth -- the full moon, nineteenth -- dedicated to an offended goddess, twenty-first -- the waning half moon, twenty-eigth -- the last visible crecent, twenty-nineth -- the invisible moon, and thirtieth (possibly) -- the invisible moon. The major periods are seven days, 1/4 month, long. The Naming of the Days The Greeks named the days week after the sun, the moon and the five known planets, which were in turn named after the gods Ares, Hermes, Zeus, Aphrodite, and Cronus. Sunday -- Sun's day Monday -- Moon's day Tuesday -- Tiu's day Mars is the Roman god of war. Sources
40 Years of Hydrothermal Vent Exploration Jump to Navigation Photos & Video Ship Location San Pedro, USA Hydrothermal Vents Highlights | Nautilus Live Forty years ago, a team of researchers including our founder Dr. Hydrothermal vents are fissures in the Earth's surface that spew superheated, mineral-rich water--like geysers fueled by volcanoes! Join Dr. Share this Expedition Partners The Nautilus Exploration Program is funded by these major partners. Online Etymology Dictionary Shapeshifting Deepstaria Jelly Jump to Navigation Photos & Video Ship Location San Pedro, USA Low Light Jelly | Nautilus Live During these first ever ROV dives in Revillagigedo Archipelago, the Nautilus team has encountered some truly otherworldly organisms. This close encounter was captured with both our normal ROV Hercules HD camera and a low light camera for bioluminescence designed by Dr. Learn more about the Revillagigedo Archipelago Expedition. Share this Expedition Partners The Nautilus Exploration Program is funded by these major partners.
Anglo-Saxon runes - Wikipedia The left half of the front panel of the 7th century Franks Casket, depicting the Germanic legend of Weyland Smith and containing a riddle in Anglo-Saxon runes. Anglo-Saxon runes are runes used by the early Anglo-Saxons as an alphabet in their writing. The characters are known collectively as the futhorc (or fuþorc), from the Old English sound values of the first six runes. The futhorc was a development from the 24-character Elder Futhark. Since the futhorc runes are thought to have first been used in Frisia before the Anglo-Saxon settlement of Britain, they have also been called Anglo-Frisian runes.[1] They were likely used from the 5th century onward, recording Old English and Old Frisian. They were gradually supplanted in Anglo-Saxon England by the Old English Latin alphabet introduced by Irish missionaries. History[edit] There are competing theories about the origins of the Anglo-Saxon futhorc. In England the futhorc expanded. Letters[edit] A chart showing 30 Anglo-Saxon runes
A Burst of Deep Sea Fireworks: Halitrephes Jelly Jump to Navigation Photos & Video Ship Location San Pedro, USA Firework Jelly | Nautilus Live We're starting this year with deep sea fireworks, and a spirit of exploration! The frilled tentacles of the Halitrephes maasi jelly came into view at 1225m in the Revillagigedo Archipelago off Baja California, Mexico. Share this Expedition Partners The Nautilus Exploration Program is funded by these major partners. Googly-Eyed Stubby Squid Jump to Navigation Photos & Video Ship Location San Pedro, USA Googly-eyed Stubby Squid | Nautilus Live The team spotted this Stubby Squid off the coast of California at a depth of 900 meters (2,950 feet). -- Related Video: Cute Bobtail Squid Share this Expedition Partners The Nautilus Exploration Program is funded by these major partners.