From 8f80a2a7327bcec9b86387fad46fcc2dd1119dbc Mon Sep 17 00:00:00 2001 From: Andrew Cady Date: Sat, 17 Sep 2022 03:29:41 -0400 Subject: calendar entries: finished inputting all of Sagan's entries --- CosmicCalendar.hs | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 93 insertions(+), 4 deletions(-) diff --git a/CosmicCalendar.hs b/CosmicCalendar.hs index 4944132..69d1d5d 100644 --- a/CosmicCalendar.hs +++ b/CosmicCalendar.hs @@ -415,14 +415,103 @@ Named Nyasasaurus parringtoni, the roughly 243-million-year-old fossils represen https://www.smithsonianmag.com/science-nature/scientists-discover-oldest-known-dinosaur-152807497/ |], - CalendarEntry (518 & millionYearsAgo) Nothing - "Vertebrates" - "Animals with backbones" + CalendarEntry (210 & millionYearsAgo) Nothing + "Mammals" + "" [text| - Vertebrates (/ˈvɜːrtəbrɪts, -ˌbreɪts/)[3] comprise all animal taxa within the subphylum Vertebrata (/ˌvɜːrtəˈbreɪtə/)[4] (chordates with backbones), including all mammals, birds, reptiles, amphibians, and fish. Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 69,963 species described.[5] + The earliest known mammals were the morganucodontids, tiny shrew-size creatures that lived in the shadows of the dinosaurs 210 million years ago. They were one of several different mammal lineages that emerged around that time. All living mammals today, including us, descend from the one line that survived. + |] + "https://www.nationalgeographic.com/science/article/rise-mammals", + + CalendarEntry (150 & millionYearsAgo) Nothing + "Birds" + "" + [text| + The first birds had sharp teeth, long bony tails and claws on their hands. The clear distinction we see between living birds and other animals did not exist with early birds. The first birds were in fact more like small dinosaurs than they were like any bird today. + + The earliest known (from fossils) bird is the 150-million-year-old Archaeopteryx, but birds had evolved before then. A range of birds with more advanced features appeared soon after Archaeopteryx. One group gave rise to modern birds in the Late Cretaceous. + |] + "https://australian.museum/learn/dinosaurs/the-first-birds/", + + CalendarEntry (130 & millionYearsAgo) Nothing + "Flowers" + "" + [text| + Today, plants with flowers--called angiosperms--dominate the landscape. Around 80 percent of green plants alive today, from oak trees to grass, are flowering plants. In all of these plants, flowers are part of the reproductive system. But 130 million years ago, flowering plants were rare. Most plants reproduced with spores, found today on ferns, or with seeds and cones, found today on pine trees. The plant fossils found in Liaoning, China, show evidence of plants with spores or seeds--and perhaps one of the first flowering plants. + + Researchers have found an ancient plant in Liaoning, Archaefructus, that has very small, simple flowers and could be one of the first flowering plants. Archaefructus lived around 130 million years ago and probably grew in or near the water. + |] + "https://www.amnh.org/exhibitions/dinosaurs-ancient-fossils/liaoning-diorama/when-flowers-first-bloomed", + + CalendarEntry (85 & millionYearsAgo) Nothing + "Tyranosaurids" + "The Tyrant Lizards" + [text| + The name says it all. This group of huge carnivores must have tyrannically ruled the land during the last part of the Cretaceous, 85 to 65 million years ago. Short but deep jaws with banana-sized sharp teeth, long hind limbs, small beady eyes, and tiny forelimbs (arms) typify a tyrannosaur. The Tyrannosauridae included such similar animals (in rough order of increasing size) as Albertosaurus, Gorgosaurus, Daspletosaurus, Tarbosaurus, and of course Tyrannosaurus rex. + + T. rex was one of the largest terrestrial carnivores of all time. It stood approximately 15 feet high and was about 40 feet in length, roughly six tons in weight. In its large mouth were six-inch long, sharp, serrated teeth. + + Just about two dozen good specimens of these animals have been found and these finds are from highly restricted areas in western North America. Henry Fairfield Osborn, of the American Museum of Natural History in New York City, first described Tyrannosaurus rex in 1905. This first specimen of Tyrannosaurus is now on display at the Carnegie Museum of Natural History in Pittsburgh, Pennsylvania. |] "", + CalendarEntry (65 & millionYearsAgo) Nothing + "Dinosaurs extinct" + "Mammals take over land & sea" + [text| + |] + "", + + CalendarEntry (27.5 & millionYearsAgo) Nothing + "Apes and monkeys split" + "" + [text| + Studies of clock-like mutations in primate DNA have indicated that the split between apes and Old World monkeys occurred between 30 million and 25 million years ago. + |] + "https://www.nsf.gov/news/news_summ.jsp?cntn_id=127930", + + CalendarEntry (12.1 & millionYearsAgo) Nothing + "Humans and chimpanzees split" + "" + [text| + A 2016 study analyzed transitions at CpG sites in genome sequences, which exhibit a more clocklike behavior than other substitutions, arriving at an estimate for human and chimpanzee divergence time of 12.1 million years.[20] + |] + [text| + https://en.wikipedia.org/wiki/Chimpanzee%E2%80%93human_last_common_ancestor + |], + + CalendarEntry (4.4 & millionYearsAgo) Nothing + "Humans first walk upright" + "" + [text| + The earliest hominid with the most extensive evidence for bipedalism is the 4.4-million-year-old Ardipithecus ramidus. + |] + [text| + https://www.smithsonianmag.com/science-nature/becoming-human-the-evolution-of-walking-upright-13837658/ + |], + + CalendarEntry (300 & thousandYearsAgo) Nothing + "Modern humans evolve" + "" + [text| + Among the oldest known remains of Homo sapiens are those found at the Omo-Kibish I archaeological site in south-western Ethiopia, dating to about 233,000[2] to 196,000 years ago,[3] the Florisbad site in South Africa, dating to about 259,000 years ago, and the Jebel Irhoud site in Morocco, dated about 300,000 years ago. + |] + [text| + https://en.wikipedia.org/wiki/Early_modern_human + |], + + CalendarEntry (100 & thousandYearsAgo) Nothing + "Human migration out of Africa" + "" + [text| + Between 70,000 and 100,000 years ago, Homo sapiens began migrating from the African continent and populating parts of Europe and Asia. They reached the Australian continent in canoes sometime between 35,000 and 65,000 years ago. + + Map of the world showing the spread of Homo sapiens throughout the Earth over time. + |] + [text| + https://www.khanacademy.org/humanities/world-history/world-history-beginnings/origin-humans-early-societies/a/where-did-humans-come-from + |], + CalendarEntry (600 & millionYearsAgo) Nothing "Multicellular life" "" -- cgit v1.2.3