Time seems like a simple thing, but why is our experience of it so subjective? Do our own neurological limitations prevent us from fully understanding time–and is it possible to even answer that? And is our inability to answer that due to limitations of language or limitations of understanding?

Physicist Brian Greene ponders these questions–amongst a few others–with the help of neuroscientist Lera Boroditsky and linguist Dean Buonomano. It last about 90 minutes…we think. Then again, that may not matter.