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Most of us are taught that the universe began with a giant explosion called the Big Bang. But what if that picture is incomplete—or even wrong? In this month's KPL astronomy talk, Niayesh Afshordi will explore the growing cracks in our standard cosmic origin story and introduce rival ideas that challenge the very notion of a beginning of time.

Wednesday, March 4, 2026 11:30 am - 12:30 pm EST (GMT -05:00)

Astroseminar - Charlie Mpetha

"Cluster Lensing in the Stage-IV Era"

Charlie Mpetha did his undergraduate at Lancaster University, then moved to a PhD in gravitational wave cosmology at the University of Edinburgh. Mid-way through his PhD, in 2023, he won a Leverhulme Study-Abroad scholarship to work at the WCA for a year with James Taylor on topics in cluster cosmology. Now, Charlie is in his first year as a NASA Postdoctoral Fellow at Goddard, working on cluster science for the Nancy Grace Roman space telescope.