Everything you see, touch and are built from is a minority of what the universe is actually made of, and the closer physics looks at the rest, the less the picture holds together. Over the next 3 hours, we move outwards through that problem: from the 85 per cent of matter that is invisible, to the visible matter whose textbook description is admittedly unfinished, to a dimension of space that scientists are now building by hand in a lab, and finally to the question of whether we can ever truly know what reality is made of at all.

Watch our interview with Dark Energy Researcher, Tessa Baker: • What If Dark Energy Comes From Space-Time…

00:00:00 Intro.
00:01:39 We May Be Wrong About Dark Matter.
00:31:38 Frank Close: We Were Wrong About Matter.
01:39:09 Scientists Build A Window Into The Fourth Dimension.
02:01:37 Sean Carroll: We May Never Understand Reality.

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