The Air Force won’t yet confirm which of the Boeing-built spaceplanes will be making the voyage. The first craft returned in October from a 675-day mission in space following a 224 day trek in 2010. OTV No. 2 spent 469 days in space in 2011-2012 on its only mission so far. “The program selects the Orbital Test Vehicle for each activity based upon the experiment objectives,” said Capt. Chris Hoyler, an Air Force spokesperson. “Each OTV mission builds upon previous on-orbit demonstrations and expands the test envelope of the vehicle. The test mission furthers the development of the concept of operations for reusable space vehicles.”

Methuselah sprouted back in 2005, when agriculture expert Solowey germinated his antique seed. It had been pulled from the remains of Masada, an ancient fortification perched on a rock plateau in southern Israel, and at the time, no one could be sure that the plant would thrive. But he has, and his recent reproductive feat helps prove just how well he’s doing.

For a while, the Judean date palm was the sole representative of his kind: Methuselah’s variety was reportedly wiped out around 500 A.D. But Solowey has continued to grow date palms from ancient seeds discovered in the region, and she tells National Geographic that she is “trying to figure out how to plant an ancient date grove.” Doing so would allow researchers to better understand exactly what earlier peoples of the region were eating and how it tasted.

In this new research, Harvey and his team realized just how invisible this stuff is, even to itself. As two galactic clusters collide, the stars, gas and dark matter interact in different ways. The clouds of gas suffer drag, slow down and often stop, whereas the stars zip past one another, unless they collide — which is rare. On studying what happens to dark matter during these collisions, the researchers realized that, like stars, the colliding clouds of dark matter have little effect on one another.

Thought to be spread evenly throughout each cluster, it seems logical to assume that the clouds of dark matter would have a strong interaction — much like the colliding clouds of gas as the colliding dark matter particles should come into very close proximity. But rather than creating drag, the dark matter clouds slide through one another seamlessly.

The interviews, part of a running series of GAO audits of the NASA flagship observatory, which is billions of dollars overbudget and years behind schedule, were intended to identify potential future trouble spots, according to a GAO official. But Northrop Grumman Aerospace, which along with NASA says the $9 billion project is back on track, cited concerns that the employees, 30 in all, would be intimidated by the process.

The report, which took one full year into account, found that complaints against police have fallen 40.5 percent and use of “personal body” force by officers has been reduced by 46.5 percent. Use of pepper spray has decreased by 30.5 percent.

The GAO report says the IRS uses old outdated software without proper security functions. IRS passwords can easily be compromised, the report notes. Even worse, the report says the IRS does not always delete employee access when workers quit or are fired.