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SUMMARY:A Unicellular Perspective on the Origin of Animals
LOCATION:Biology 136
TZID:America/Denver
DTSTART:20260915T160000
UID:2026-09-04-19-52-11@natsci.colostate.edu
DTSTAMP:20260904T195211
Description:The Department of Biology is pleased to welcome Dr. Carl Simps
 on\, Associate Professor of Earth Science at the University of Colorado\,
  Boulder and Curator of Invertebrate Paleontology\, for an upcoming BIO
  Seminar.\n\nDr. Simpson will present “A Unicellular Perspective on the
  Origin of Animals\,” a talk that explores animal origins through the l
 ens of unicellular life and evolutionary biology.\n\nEvent Details\nSpeake
 r: Dr. Carl Simpson\nTitle: A Unicellular Perspective on the Origin of Ani
 mals\nDate: Tuesday\, September 15\nTime: 4:00 PM\nLocation: Biology 13
 6\n\nHosted by Dr. Nico Mongiardino Koch\, Assistant Professor of Biology
 \n\nLight refreshments while supplies last.\n\nWe invite students\, facult
 y\, and staff to join us for this thought-provoking seminar.\nVisit our we
 bsite for more information on our seminars and follow us on social media 
 for more announcements from Biology.\n\n 	\nInstagram: @csubio\n 	\nTwitte
 r/X: @csubiology\n 	\nFacebook: Department of Biology at Colorado State Un
 iversity\n\nAbstract\nMetazoans appear to have evolved and diversified dur
 ing an ~200 million year window (around 800–600 mya) during the Neoprote
 rozoic Era. At this time\, much of the Earth system was in flux – it inc
 luded 70 million years of the global Snowball Earth glaciations\, massive 
 global erosion\, and the rise of atmospheric oxygen\, all of which have be
 en proposed to be the cause the origin of animals. But we do not know if a
 ny of these earth system changes were important for their origin. What we 
 do know is that the ecological changes that come with animal multicellular
 ity are due to the shift in the dominant physics that the organisms experi
 ence\, even if we have yet to fully understand the shift. An experimental 
 approach trying to evolve unicellular animal relatives into large and orga
 nized multicellular forms may help identify what was important for the ori
 gins of animals. Using the choanoflagellate Salpingoeca rosetta\, we show 
 that high seawater viscosity leads to the evolution of large motile coloni
 es and provide a general mechanistic theory for why selection for multicel
 lularity occurs.\n\n 4:00 pm
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