Physics at the Universe’s Limits (Synopsis)

When you think about cosmology and the fundamental questions scientists are trying to address, you inevitably wind up thinking about dark matter, dark energy and black holes as the three biggest topics that shape our view of the Universe.

Image credit: NASA/WMAP science team.
Image credit: NASA/WMAP science team.

But there are plenty of other aspects to this branch of science that deserve at least equal attention, including two important aspects that are rarely talked about with the same fervor or frequency: the highest energy particles in the Universe and the Universe’s “dark ages,” a period after the formation of neutral atoms but before any stars had formed!

Image credit: Pierre Auger Observatory, via http://apcauger.in2p3.fr/Public/Presentation/.
Image credit: Pierre Auger Observatory, via http://apcauger.in2p3.fr/Public/Presentation/.

Amanda Yoho has the full story; read and enjoy!