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collinsmark reacted to Charles Link's post in the thread Undergrad Why Does Snow Pack Better Near the Melting Point? with
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The above is a photo of a 4'0" snowman that I made today, New Year's Eve 2025, in Chicago. We had about a half inch of snow, but... -
collinsmark reacted to Charles Link's post in the thread Undergrad Why Does Snow Pack Better Near the Melting Point? with
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collinsmark reacted to kuruman's post in the thread Member and Mentor Appreciation Thread with
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It's the end of the year and once again I wish to thank the mentors and admins for their stedfast commitment to the PF cause and for... -
collinsmark reacted to bruha's post in the thread Our Beautiful Universe - Photos and Videos with
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Hello, here is two simple images of saturday clear night sky at Bohmerwald - Orion center and Part of Sky with Andromeda gal. Lot of... -
collinsmark reacted to Andy Resnick's post in the thread Our Beautiful Universe - Photos and Videos with
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It's been cloudy for the past week and will be cloudy again for another; in between was one clear night spent imaging a somewhat-tight...