The Radar: Tipping Around the World, Where to Brunch in Copenhagen, Twitter Scales Everest

• When traveling in Brazil, leave the cash in your pocket. Tips are not expected from travelers, but an automatic 10 percent service charge is typically added to restaurant bills. Get more tips on tipping abroad with this handy infographic from Mint.com.  [Mint.com]

• Spotted: great brunch locations in Copenhagen, including places to order the city’s famous “Smørrebrød,” Danish for “bread and butter.” [Spotted By Locals]

• On May 5, an English mountaineer made the world’s first tweet from the top of Mount Everest. Everest first got 3G coverage back in October. Can you hear me now? [Gizmodo]

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Photo: Mihai Alistar/My Shot