Photograph files taken with a digital camera also carry certain Exchangeable Image File Format (EXIF) data where you can see the camera settings that were set when the photo was taken.
Remember the 5 world records breaking Felix Baumgartner in his epic super sonic free fall from the edge of space? I bet you do, now you can watch the full behind the scenes documentary of this epic event.
Humans wouldn't last long in space without significant technological assistance, does that mean we need to alter human biology to prepare it for future space travels?
In the 21st century historians have increasingly portrayed the decade as a "pivot of change" in world history focusing especially on the political and economic upheavals. Check your 70s knowledge.