Imagine having access to all the ancient maps of the world, and being able to explore them with AI, including searching on the words etched in the maps, or concepts about the maps – for instance “give me all the maps showing the routes of Roman aqueducts.” All this and more are available online for free, at the David Rumsey Map Collection. For 25 years Rumsey has been scanning over 140,000 maps of all kinds from his insane collection from around the world. He then innovates ways to share them. When you find a map you particularly like, you can tap a button and have it printed out on a large scale and mailed to you for a reasonable fee. This is an international treasure. — KK

Far Out Company is a curated archive of 1960s–70s counterculture visual art — concert posters, TV shows, underground newspapers, commune newsletters, comix, hippie business advertisements, and album art. I love the DIY design aesthetic of this era: hand-lettered type, day-glo colors, psychedelic illustrations. Artists and designers like Wes Wilson, Rick Griffin, and Milton Glaser were doing world-class work for free newspapers. It’s a good resource for design inspiration or a trippy rabbit hole to fall into. — MF

My father kept recommending Frans G. Bengtsson’s novel The Long Ships to me, but I kept putting it off. As soon as I started reading it, I was enthralled. This 1941 Swedish classic follows Red Orm, a Danish boy abducted by Vikings, through galley slavery, Moorish Spain, battles in England, and treasure hunts along Russian rivers. It’s funny, exciting, and endlessly inventive. If you liked Game of Thrones, Edgar Rice Burroughs, or Jack Vance, you’ll probably love it too. Novelist Michael Chabon, who wrote the introduction, says he’s only ever met three other people who knew the book — and all of them, like him, “loved it immoderately.” — MF

Most sources of AI-generated content do not warrant a second visit. The only AI-generated content I have been returning to are two YouTube channels that use AI to reconstruct history. The first one, Majestic Studios, recreates daily life in now legendary ancient cities as seen through time. I learned a lot, for instance, by following the development of Paris from 259 BC till the present. This same creator (a British bloke, Jonathan Laramime) created a synthetic character named Chloe, styled as an influencer in LA, who pretends to be a time-travelling tourist. Chloe is very believable. She wanders the streets in ancient times taking selfies and being wowed by the cultural norms. Chloe’s valley girl reactions to the ancient world is accessible and entertaining, but also historically accurate, which has made the channel Chloe VS History a viral hit. Recreating history is the perfect job for AI, and I expect these channels to be the first of many, as other history buffs create their own improved versions. — KK

I believe every American should be required to watch Ken Burn’s Civil War series to understand their country today. Ken Burns has done it again with his new series on The American Revolution. Six episodes, 12 hours. LIke his other series, it unsettles the story-book history we have in our heads, and celebrates the complexity of the actual ideas, events, and complicated characters at the time. — KK

Here’s a person-made map listing the birthplaces of influential ideas that shaped civilization. More than 250 of the world’s greatest ideas and inventions, color-coded by fields of knowledge. It’s fun to explore and learn something new. — CD

This historical tech tree is now my favorite way to explore history—a searchable timeline of discoveries, inventions, and tools spanning the ages. You can search by field, year, person, or by the name of the “tech”—which, by this website’s definition, is “a piece of knowledge (an idea) that is created intentionally by humans for a practical purpose (not for its own sake) and is implemented in some kind of physical substrate.” Each tech links to a Wiki page, or branches to other techs that it either built upon or led to. You never know where you'll end up—I just learned all about water clocks. I love this navigable visualization of human innovation, and it's inspiring to imagine what lies ahead of us. — CD

I make espressos at least three times a day. The machine, grinder, and knock box are on a wood kitchen counter, and it's getting stained from drips and spills. This Amoami 12"x19" rubber mat keeps my coffee corner clean and tidy. The absorbent material quickly soaks up any spills without letting moisture seep through to the counter. It's low-maintenance — a quick wipe cleans it up. — MF

The strangest book I own is the Secret Museum of Mankind. It is a thick book of a thousand grainy black and white photos of tribal people taken over a hundred years ago. The fuzzy photos show costumes and dress, strange tattoos and scarifications, topless women, bizarre religious rituals, cruel punishments, and esoteric practices of cults. The book has no author, no credits, no copyrights, no page numbers, and has the appearance of being reproduced many times without permission. There’s no text in the book except for short unreliable captions that are dated and full of prejudices of that time. I keep coming back to the photos which capture worlds long gone. Despite its titillating gaze, you can see the texture of everyday life for most people with unvarnished realism in a world before electricity, coal, and manufacturing—all revealed with a directness I have not seen published elsewhere. The book is most useful to anyone interested in clothes and fashion as every bit of clothing here was handmade and custom. While used copies are not hard to find, a good digital version has been scanned by Ian Macky, with added index and image grid, and is free here. — KK

Network of Time is a website that lets you choose two historical figures and connect them through a series of photographed encounters across time. It’s a fun way to waste time, and fascinating how it visually demonstrates the interconnectedness of human experiences and relationships throughout history. — CD

TimeMap.org presents a world mapwith a slider bar that starts at 4000 BC and ends at the present day. As you slide through time, you watch empires rise and fall. Any interesting civilization or event you spot can be instantly researched — just click on it and the relevant Wikipedia article appears in a side panel. — MF

The Museum of the History of the Polish Jews in Warsaw, Poland is one of the best museums I’ve ever visited and I’ve visited a lot of museums. It’s a several hours meander through recreated time periods over thousands of years, which immerses you into that period with brilliant veracity. It emphasizes the everyday life at each period, which makes it larger than just a Jewish experience. I recommend a visit to the museum even if you are only interested in the art of exhibits, storytelling, and immersive experiences. — KK

When Spanish conquistadors marched into the island city of Mexico-Tenochtitlan in 1518, they were stunned by what they encountered. The scale, richness, complexity, and advancement of this capital built by the local Aztecs surpassed anything in Spain at the time. I find this 3D virtual reconstructed Portrait of Tenochtitlan on lake Texcoco to reward endless scrutiny. The sliding overlay of modern Mexico City is genius. I am as much stunned by its grandeur as the first invaders. – KK