<http://schema.org/articleBody>
" Welcome to PM/AM, Popular Mechanics&amp;#039; morning briefing on the top science and tech stories for today.   The 45th anniversary of the first moon landing was yesterday, so the timing seems fitting for NASA to announce the existence of lunar caves that could someday serve as astronaut safe havens. After analyzing images from the Lunar Reconnaissance Orbiter spacecraft, NASA has found around 200 such caves on the moon. These &amp;quot;lunar pits&amp;quot; range in diameter from 15 to 3000 feet across and were probably formed when lava flowed underneath the moon&amp;#039;s surface, making large, hollow lava tubes.  The caves could be used as preliminary moon bases before we build more permanent structures. &amp;quot;Pits would be useful in a support role for human activity on the lunar surface,&amp;quot; said Robert Wagner in the NASA press release. Wagner created a computer algorithm that discovered most of the caves. &amp;quot;A habitat placed in a pit\u2014ideally several dozen meters back under an overhang\u2014would provide a very safe location for astronauts: no radiation, no micrometeorites, possibly very little dust, and no wild day-night temperature swings.&amp;quot;  Wagner hopes to develop a new mission to send probes in a couple of the pits to see what&amp;#039;s down there.  Read This  Learn more about the surface-to-air missile that shot down Malaysia Airlines Flight 17. [via CBC News]   Airbus filed a patent for the most uncomfortable-looking airplane seats yet. [via CNN]   Tesla&amp;#039;s Model 3 will cost a more affordable $35,000. [via CNET]  Watch This       A breakdown of the top 10 weirdest/creepiest apps that may make you lose some faith in humanity. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/technology/a10889/pmam-moon-caves-could-protect-future-astronauts-2463691/>