On 28th November OxTalks will move to the new Halo platform and will become 'Oxford Events' (full details are available on the Staff Gateway).
There will be an OxTalks freeze beginning on Friday 14th November. This means you will need to publish any of your known events to OxTalks by then as there will be no facility to publish or edit events in that fortnight. During the freeze, all events will be migrated to the new Oxford Events site. It will still be possible to view events on OxTalks during this time.
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Earth likely acquired a significant fraction of its volatile elements during the main stages of accretion. The atmospheres of the planetary embryos that accreted to form Earth must therefore have survived the giant impacts (collisions between planet-sized bodies) that dominate the end of accretion. Using numerical simulations of giant impacts, I will show that the efficiency of atmospheric loss depends strongly on the surface conditions on the colliding bodies (e.g., atmospheric pressure, presence/absence of an ocean). Understanding the complex feedbacks between the evolution and survival of planetary atmospheres provides new insights into the origin of our atmosphere and ocean.
