We've made huge strides in understanding the nature and composition of the physical universe, but it's clear that much remains to be learned — as it should be.
June 14, 2017
We've learned so much, yet we still don't know the composition of 95 percent of the cosmos. It is good to stay humble and keep an open mind as the search continues.
September 10, 2014
We don't have all the answers; many big questions hang over the world of theoretical physics. Is this business as usual? Or symptom of a major crisis in our understanding of nature?
July 23, 2014