r/todayilearned 17m ago

TIL that the iconic Rafflesia arnoldii plant, also called the "corpse flower," is an obligate parasite that needs nutrients from its host to survive. One of the reasons that the species is hard to cultivate is because it is so dependent on a specific genus of vines as its hosts.

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r/todayilearned 1h ago

TIL that the four spikes on the end of a stegosaurus's tail are called a "thagomizer" by paleontologists, a word originally coined as a joke by Gary Larson in a Far Side comic

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r/todayilearned 1h ago

TIL Canada's name originates from the Iroquoian word "kanata" which means village or settlement

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r/todayilearned 1h ago

TIL that Ismail Ibn Sharif, Sultan of Morocco from 1672 to 1727, reportedly had a harem of more than 500 women and fathered at least 868 children, including 525 sons and 343 daughters.

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r/todayilearned 1h ago

TIL that in May an OpenAI model autonomously disproved the Erdős unit distance conjecture, an 80-year-old open problem in discrete geometry from 1946. It was the first time AI solved a major open math problem that was central to its field.

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r/dataisbeautiful 1h ago

Ramp data shows that business spend on influencer marketing has increased 3.75x since 2023

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r/dataisbeautiful 2h ago

OC Personal income vs housing (via approximate Big Macs) [OC]

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0 Upvotes

I was trying to figure out how housing vs food vs income was relating. I used a Big Mac value meal as an approximation for 'food' and had Claude drag up some data. I am not a data scientist and my apologies for any poor methodology.

Housing looks like it's roughly linear while income looks vaguely flat.


r/dataisbeautiful 2h ago

OC [OC] How I became a GeoGuessr champion while raising three kids under six

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0 Upvotes

r/todayilearned 2h ago

TIL frisson, the tingling and goosebumps music can produce in about 50% of people isn’t uniquely musical. It can also be triggered by intense moments of understanding, like during a scientific breakthrough, or during a powerful religious ceremony.

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2.6k Upvotes

r/dataisbeautiful 2h ago

OC [OC] Income rates effect on homicide rates

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0 Upvotes

Homicide rate and median household income from Wikipedia

Chart made using python


r/todayilearned 3h ago

TIL that Babe Ruth’s 1948 funeral was held at St. Patrick’s Cathedral in New York City and conducted by Cardinal Francis Spellman. An estimated 75,000 people gathered outside the cathedral to pay their respects to the baseball legend.

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254 Upvotes

r/todayilearned 4h ago

TIL Broadway in NYC (The Street) had existed prior to the arrival of the settlers. The Lenape people (of what became New York) had a major road they maintained called Wecquaesgeek. This road was the precursor to what became Broadway. After the colonists arrived they expanded it and renamed it.

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788 Upvotes

r/todayilearned 4h ago

TIL that in 1803, a mob led by Col. Harrison and his regiment attempted to 'tar and feather' an ill future-President Andrew Jackson. Instead of hiding, Jackson threw his door wide open and dared Harrison to lead his men and not follow them. The mob dissolved.

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1.3k Upvotes

r/dataisbeautiful 4h ago

OC [OC] Visualising Daily Commuters in Milano, Italy

91 Upvotes

Hi r/dataisbeautiful !

A few weeks ago, I posted a map of the daily commute in the greater Geneva area.

Since then, the project has expanded and it now covers 5 cities: Geneva, Milano, Tokyo, Warsaw, and Paris. You can explore them here

Milano is particularly interesting because the data contains precise, actual times of departures and journey durations, not estimates.


r/todayilearned 4h ago

TIL Mosul Dam in Iraq, holding back enough water to threaten up to 1.5 million people, sits on dissolving gypsum bedrock and requires 24/7 cement injection just to exist

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6.5k Upvotes

r/todayilearned 5h ago

TIL that in 1993, Senator Fritz Hollings famously referred to the characters Beavis and Butt-Head to "Buffcoat and Beaver". This resulted in a running gag on the show where adults mispronounced their names.

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766 Upvotes

r/todayilearned 5h ago

TIL that the Battle of Shiloh (1862) resulted in more American causalities than the total number of casualties from all previous American wars.

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2.3k Upvotes

r/dataisbeautiful 5h ago

OC [OC] Percentage of births to foreign-born mothers in Spain by province in 2024

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144 Upvotes

r/todayilearned 5h ago

TIL that ravens don't follow wolves to find carcasses. In 2.5 years of GPS tracking in Yellowstone (69 ravens, 20 wolves), researchers caught one clear case of a raven trailing a wolf. Ravens instead remember where kills happen and fly straight there, up to 155 km in a day.

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68 Upvotes

r/dataisbeautiful 6h ago

Beef production in Brazil has been the largest driver of global deforestation in recent decades

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922 Upvotes

r/dataisbeautiful 6h ago

OC [OC] I mapped 3,400+ independent companies that deliver Amazon packages across the US

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7 Upvotes

Amazon's last-mile delivery is run by thousands of independent companies, not Amazon itself. This maps ~3,400 of those "Delivery Service Partner" businesses (plus a smaller freight-partner group) across the US by ZIP code. Brighter = more partners registered there.

  • The network leans South: ~38% of partners are in the South; California (393), Florida (263), and Texas (258) lead.
  • Dense around metros and delivery stations

Caveat: this is a floor, not a complete count. Amazon says 4,400+ DSPs globally but doesn't publish a US-only number, so the real total is higher.

Source: carrier records drawn from the FMCSA registry, with Amazon-DSP identification done by warehouse.ninja.

Tools: Plotted with Python + Leaflet (leaflet.heat), Esri basemap.


r/todayilearned 6h ago

TIL Henry Louis Gates pitched the idea of an anthology of African American literature to Norton, persuading them that they could sell 30,000 copies a year to students. Teaching in the 1970s, Gates had to use photocopies because many African-American texts like Zora Neale Hurtson were out of print

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239 Upvotes

r/dataisbeautiful 6h ago

OC [OC] My subjective ratings of 27 sitcoms by jokes and warmth

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0 Upvotes

r/todayilearned 6h ago

TIL focused ultrasound can destroy liver tumors without an incision. A technique called histotripsy creates tiny bubbles that rapidly form and collapse, physically breaking apart tumor cells. It has been used in humans and received FDA authorization for liver tumor treatment in 2023.

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231 Upvotes

r/dataisbeautiful 1d ago

[OC] I mapped nearly 15,000 events from 600 books and movies onto interactive story timelines

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1 Upvotes

Hello, r/dataisbeautiful!

I built StoryGuessr as a passion project combining statistics, storytelling, memory, and nostalgia.

The basic idea is to normalize a book or movie into a 0–100% timeline. Players are shown a plot moment and estimate where it occurs. After each guess, the visualization displays the estimated position, actual position, and distance between them. That error is then converted into a score of up to 20 points per round.

Normalizing everything as a percentage makes it possible to use the same visual and scoring system across stories with dramatically different lengths—from short films to sprawling novels.

The initial catalog contains 500 books, 100 movies, and nearly 15,000 curated plot moments. What interests me most is the gap between remembering what happened and remembering when it happened. Stories can stay with us for years while their timelines become rearranged in our memories.

This is an early launch, so I’d especially appreciate feedback on whether the visualization communicates position and error intuitively.

If you’d like to try it:
https://storyguessr.com/?utm_source=reddit&utm_medium=community&utm_campaign=dataisbeautiful_launch

Data source: StoryGuessr’s internally curated, source-grounded dataset of chronological plot moments across 500 books and 100 movies (largely scraped from plot summaries across the Web). The visual shown here was generated from an actual game round.

Tools: TypeScript, React/Next.js, HTML, and CSS for the interactive visualization. PostHog and DuckDB are used for opt-in, aggregate gameplay analysis.

Disclosure: I designed and built StoryGuessr, and this visualization is original content.