Jenny Xie

Nathan Sharratt

You Can Only See This Amazing Invisible Graffiti When It Rains

 An innovative take on street art. 

Vincent Yu/AP

The Hong Kong Marathon Wants to Ban Selfies

Even a quick snap can cause a massive, dangerous runner pile-up, organizers say.

MegaNewsRussia/Youtube

This Russian Library Just Hired a Stray Cat as Its Assistant Librarian

He's required to wear a bow tie, and gets paid in food.

George Zisiadis

This Sidewalk Art Installation Transforms Heartbeats Into Music

And helps local officials understand public space.

Oxfordian/Flickr

A Potentially Brilliant Idea to Keep Escalator Obstructers to the Right

Because poor etiquette should not be the reason you miss the train. 

MIT Megacities Logistics Lab

How Supply Chain Data Can Affect Bike Lanes as Much as the Cost of Bread

MIT researchers are working on a potentially massive public-access database of metrics like retail density and delivery frequency.

mentakingup2muchspaceonthetrain.tumblr.com

Who Has Worse Subway Etiquette: Men or Women?

A war of the sexes, waged on Tumblr.

Kristian Buus/Greenpeace

Massive Puppet of the Day: A Polar Bear the Size of a Double-Decker Bus

Meet Aurora.

Hammerhead

Gadget of the Day: A Bike Navigator That Keeps Your Eyes on the Road

The Hammerhead straps onto your handlebars, using bright LEDs to point you in the right direction.

Shutterstock

Why Teaching a Homeless Man to Code Isn't That Bad a Place to Start

We may all have been a little too hard on Patrick McConlogue.

MBTA

Map Battle of the Day: Pick Boston's Best Subway Map Redesign

Options galore.

UNStudio

Superlative of the Day: Japan Wants to Build the World's Tallest Ferris Wheel

It would be nearly twice the size of the London Eye.

Mohammed Salem/Reuters

Most of the World's Tallest Buildings Game the System With 'Vanity Height'

Is all that space actually a waste?

Brian Kidd

Portland Absurdity of the Day: Unicycler Plays Star Wars Theme On Flaming Bagpipes

Keep Portland weird, indeed.

Nathan Pyle

Amazingly Helpful GIFs of the Day: What Every New Yorker Should Know

Secrets and unwritten rules, illustrated.

Craigslist

Ridiculous Rent of the Day: $2,100 for a Curbside Bed in San Francisco

A clever commentary on the Bay Area's crazy real estate market.

Stefan Wermuth/Reuters

Can Reflective Buildings That Produce 'Death Rays' Be Prevented?

A recent car-melting incident in London is not the first time a building has produced high-temperature beams. 

Ethan Schlussler

Bicycle-Powered Treehouse Elevator of the Day: Yes, This Exists

It's fun and functional.

Reuters

Shanghai's Hilarious New Take on the Giant Floating Duck

The rubber duck is now a cooked bird, complete with "crispy brown skin" and a yellow papier mache head.