Foursquare's New Radar Feature Is Better Than Find My Friends [IPhone Apps]

By Casey Chan Oct 12, 2011 12:54 PM 8,033 12

Thanks to iOS 5, Foursquare has a new Radar feature in its iPhone app that's insanely cool. Radar will smartly let you know if you're near friends, around a place on your To-Do List or followed and will even notify you when the app is closed. It's like a super useful Find My Friends.

Foursquare's examples are, "If you follow a list, like the 101 Best Dishes of 2011, foursquare will let you know when you're next to one. Or you save that yoga studio to your To-Do List (because you really want to try it); we can remind you when you're close."

It just works! Radar finds the places you've already wanted to go but didn't know were next to you. So smart I might start using Foursquare. The new update of Foursquare should be hitting the App Store soon. [Foursquare]

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Before Radar, Militaries Used Gigantic Headphones for Land-Based Sonar [Past Perfect]

Radar is wonderful, sure, but militaries didn't always have the benefit of radar to pinpoint enemy locations. Before that, there was sonar. Underwater is one thing, though. On land, you needed big victrola-like contraptions that looked uncomfortable as all hell.

These acoustic locators worked in much the same way as a submarine or bat's sonar would—through active and passive echolocation. Operators could merely listen to the surrounding battlefield to analyze for aircraft or engines, or produce a signal that would reverberate off the distant artillery and give a sense of the enemy's location.

This method was, of course, replaced by the much more accurate and probably lighter radar. Can you imagine lugging these things around? Still, it was a start. I'd like to own one of these things just as an ice breaker. [A Daily Trends via Buzzfeed]

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How the World Looks Through the Noses and Muzzles and Radar of Critters [Animals]

Ever wonder how your dog's sense of smell is so sensitive that he knows you're coming from a mile away, but he still loves to roll around in rotting dead carcasses?

Or were you ever curious about what the world looks like to a bumblebee, or a turtle? If you answered yes to any of these questions, you might be a big nerd. You also might be psyched to learn that New Scientist has created an entire series, awesomely entitled "Crittervision," on the topic of how these creatures perceive the world. The series also covers snakes and bats.

[New Scientist, Image:Shutterstock]

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