The , , , and joined up for the one-hundred seventy-fourth edition of the GeoGearHeads. The show kicked of with extensive discussion about the . through May 12th from the Geocaching community which will inform a survey coming out later, which will in turn influence the future of Challenge Caches on Geocaching.com. tipped us off about a change in the Geocaching.com Live API as posted to the and forums. As of May 18th access tokens expire every six days rather than lasting till revoked (authorizations are managed through the "" tab from the "Account Settings"). Then shared more about Kayak caching, along with and his planning for "" (). On mass transit caching we heard from about the "" series of caches. also mentioned "" () – a real time puzzle website paired with mass transit to create an unknown cache with more than a thousand favorite points. The about lithium-ion batteries under a microscope was next. Finally the were submitted by . Congratulations to for submitting the winning response for this week's question, and to for winning the live prize. Thanks to for their donation of this week's gifts! The live video session from this Google+ Hangout On Air can be found on .

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