Scientists have made some headway, but there are still some frighteningly large questions to be addressed. They now agree that dark energy makes up 75 percent of the cosmos. Dark matter, another mysterious substance, commands a 21 percent share. And as for the protons and electrons we all know and love? A mere sliver of the total, at a paltry four percent. The latest issue of the journal Physics World features reflections and insights from two of the leading dark energy astrophysicists, Eric Linder and Saul Perlmutter, of the University of California, Berkeley. They say that planned and potential space missions - like the probe pictured here - could make the next decade an exciting one for astrophysics. Who knows, maybe we'll get really lucky and understand the nature of ten or even, dare I say, twelve percent of the universe!—Gregory Mone
@ popsci; Quote Feynman if you must; he really was a very funny guy. (Hence the name of one of his books) Smart and dedicated too, but ended up being known just as much, if not more for his failure than his success.
I wonder about our estimations of everything. Case in point; the recently certified, second oldest Mars meteorite ever found. Province of discovery; believed to have come down in the Sahara Desert. When they cooked it, it still had 6000 ppm water. Much more than expected.
So it got blown off of Mars with the force, friction, charge, and heat of a nuclear blast. Collects a bunch of gamma too, for that lasting warm glow of youth. Goes wherever it went before it came here, and likely got heated at least once more real good before it burned in through our thick atmo. Way thicker back when it came in, so even hotter. If you consider how much in gases and chunks of Earth that have left this world since it landed, our planet had higher gravity as well. It came in even hotter than our typical meteorite today, and probably faster as well.
I do understand that this was just one rock, with whatever capacity for crystallization sequestering that material has. Still, it had more than expected. So I hate to assume, but if the expectation was based in statistical probability, then our estimates could easily have much more +- than we think.