[{"data":1,"prerenderedAt":31},["ShallowReactive",2],{"$f3ijaai2f73s0n":3},{"slug":4,"title":5,"description":6,"date":7,"product":8,"url":9,"minutes":10,"html":11,"next":12},"walk-among-dinosaurs-in-3d","Walk among dinosaurs and woolly mammoths in 3D, in your browser","A free 3D walk through early Earth's lava fields, the Jurassic, the Late Cretaceous and the Ice Age, among dinosaurs and woolly mammoths, in your browser.","2026-10-21","Prehistoric Walk","https:\u002F\u002Fprehistoric-walk.tukka.dev",3,"\u003Cp>Dinosaurs in books and museums stand still, one at a time. I wanted to stand in a valley while a herd of Triceratops walked by, so I made \u003Ca href=\"https:\u002F\u002Fprehistoric-walk.tukka.dev\">Prehistoric Walk\u003C\u002Fa>. It's four moments of Earth's past, built in 3D, that you walk through in your browser like a video game with nothing to win.\u003C\u002Fp>\n\u003Ch2>How it works\u003C\u002Fh2>\n\u003Col>\n\u003Cli>The home page opens on a globe of Earth with a timeline under it. Slide it back from today and the continents drift into place, one map for every 5 million years, back to 540 million years ago. The last stop, at the far left, is early Earth, 4 billion years ago.\u003C\u002Fli>\n\u003Cli>The times you can walk are marked on the timeline. Stop at one and press Enter.\u003C\u002Fli>\n\u003Cli>The world opens on a slow camera glide. Press Start walking, then walk with W, A, S and D or the arrow keys and look around with the mouse. Shift runs, Space jumps and Esc pauses, where you can travel to another time or turn the sound off.\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Cp>You're an invisible time traveller, so the animals ignore you. They wander from one grazing spot to the next and now and then break into a run. Look at one and a line at the bottom of the screen gives its name, its size, what it ate and when it lived.\u003C\u002Fp>\n\u003Cp>Walking needs a computer with a keyboard and a mouse. On a phone you can still spin the globe and read about each era.\u003C\u002Fp>\n\u003Ch2>The four worlds and their animals\u003C\u002Fh2>\n\u003Col>\n\u003Cli>Early Earth, 4 billion years ago: black lava fields and lava lakes, with three smoking volcanoes under a huge Moon. Ash falls and shooting stars cross the sky. Now and then a big meteor strikes beyond the hills. Nothing is alive yet.\u003C\u002Fli>\n\u003Cli>Late Jurassic, 150 million years ago: conifer forests and ferns along a river, with herds of Apatosaurus up to 22 m long, and Stegosaurus with two rows of plates down its back.\u003C\u002Fli>\n\u003Cli>Late Cretaceous, 70 million years ago: the first flowering trees and palms around a lake, with T. rex, Triceratops, Parasaurolophus and Velociraptor.\u003C\u002Fli>\n\u003Cli>Ice Age, 20,000 years ago in North America: snowy steppe and pines around a frozen lake, with woolly mammoths, saber-toothed cats and giant ground sloths, while snow falls.\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Ch2>Things to try\u003C\u002Fh2>\n\u003Col>\n\u003Cli>On early Earth, watch the horizon. A big impact flashes first, and the boom arrives a few seconds later, like thunder after lightning.\u003C\u002Fli>\n\u003Cli>In the Late Jurassic, walk up to an Apatosaurus herd and look up at their necks.\u003C\u002Fli>\n\u003Cli>In the Late Cretaceous, find the T. rex and look at it. It's about 12 m long, and it lived right up to the asteroid impact that ended the age of dinosaurs.\u003C\u002Fli>\n\u003Cli>In the Ice Age, walk out onto the frozen lake and listen to the wind.\u003C\u002Fli>\n\u003Cli>On the home page, slide the timeline slowly back from today and watch the Atlantic close and the continents join into Pangaea.\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Ch2>What's real and what's guessed\u003C\u002Fh2>\n\u003Cp>The animals, their sizes and their dates come from the fossil record, and each era's page says who lived when. The Late Cretaceous bends time and place to fit everyone into one valley. T. rex and Triceratops really did live side by side, but Parasaurolophus lived a few million years earlier, and Velociraptor lived in Mongolia and China. Velociraptor was also the size of a turkey and covered in feathers, which its model leaves out.\u003C\u002Fp>\n\u003Cp>The animals are simple low-poly models, and the plants are stand-ins for the real prehistoric ones. The globe's maps come from the PALEOMAP elevation models of Scotese and Wright (2018); the Ice Age map lowers the sea by 120 m and adds the ice sheets, roughly outlined. Early Earth is a best guess, since nobody saw it. The colours of its sky are guesses, and its Moon, which really was much closer then, is drawn bigger still so it stands out.\u003C\u002Fp>\n\u003Cp>Prehistoric Walk is free, with no account and nothing to install: \u003Ca href=\"https:\u002F\u002Fprehistoric-walk.tukka.dev\">prehistoric-walk.tukka.dev\u003C\u002Fa>. If you'd rather walk through cities, \u003Ca href=\"\u002Fposts\u002Fwalk-through-ancient-cities-in-3d\">Ancient Cities\u003C\u002Fa> does the same for twelve cities of the past, from Mohenjo-daro to Angkor.\u003C\u002Fp>\n",[13,20,24],{"slug":14,"title":15,"description":16,"date":7,"product":17,"url":18,"minutes":19},"online-privacy-self-assessment","What could your public accounts reveal together?","Review your usernames, public location clues and account habits with a free, nineteen-question OSINT self-assessment quiz. Answers stay in your browser tab.","OSINT Self-Assessment Quiz","https:\u002F\u002Fosint-self-assesment-quiz.tukka.dev",1,{"slug":21,"title":22,"description":23,"date":7,"product":17,"url":18,"minutes":10},"what-does-the-internet-know-about-you","What does the internet know about you? How to check in 20 minutes","Search for yourself the way a stranger would: your name, usernames, photos, email and phone number. What to look for, and what to fix first.",{"slug":25,"title":26,"description":27,"date":7,"product":28,"url":29,"minutes":30},"why-your-sign-is-different-in-vedic-astrology","Why your zodiac sign is different in Vedic astrology","In a Vedic chart, your Sun sign, Moon sign and rising sign each move back one sign about four times in five. Why it happens, and the Vedic sign dates.","Astro","https:\u002F\u002Fastro.tukka.dev",4,1792561478540]