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by trackstar
December 21st, 2021, 4:26 am
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 22, 2021 One Million Years BC: An Epochrypha Far back to the lands that time forgot!   1.     List these eras in chronological order: Mesozoic, Paleozoic, Cenozoic   2.     Place each set of Periods within the proper era (no tricks here – these are grouped correctly):   SET 1 Permian      ...
by trackstar
December 21st, 2021, 4:22 am
Forum: Off Topic
Topic: News from Outer Space
Replies: 1237
Views: 165249

Re: News from Outer Space

Nice timing. There is a role for origami artists at NASA and they offer tutorials too:

Space Origami: Make Your Own Starshade - NASA Jet Propulsion Lab
by trackstar
December 20th, 2021, 6:27 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 21, 2021

Celebration of the Sun

To all sun worshippers, near and far.

Stonehenge, Newgrange, Manhattanhenge (hehe), and MIThenge. I have seen the first and the last ones in person. ; )

Happy Solstice!

Image
by trackstar
December 20th, 2021, 2:16 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 20, 2021 Sunday Solitaires 1.     Hail and Farewell!  You are walking home from a night on the town, and suddenly you are being pelted by hail. Instead of running for shelter, you decide to watch it fall and bounce. To compute a sequence for hailstone behavior, start by choosing any positi...
by trackstar
December 19th, 2021, 4:46 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 20, 2021 Sunday Solitaires 1.       Hail and Farewell!  You are walking home from a night on the town, and suddenly you are being pelted by hail. Instead of running for shelter, you decide to watch it fall and bounce. To compute a sequence for hailstone behavior, start by choosing any posi...
by trackstar
December 19th, 2021, 2:11 am
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 19, 2021 Mathematical Mysteries 1.       Breaking Bread.  This ancient problem states that 100 loaves of bread are to be divided among five men in such a way that the men receiving the two smallest shares receive a total that is one-seventh of the shares of the other three men. The shares ...
by trackstar
December 18th, 2021, 3:45 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 19, 2021 Mathematical Mysteries Well, not full-blown mysteries because that would be too long to tackle on a Saturday morning! So, a few fragments just touching on some of them for today. 1.       Breaking Bread.  This ancient problem states that 100 loaves of bread are to be divided among...
by trackstar
December 17th, 2021, 5:19 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 18, 2021 Going Green! A Little Carbon Quiz 1. Which of the following were the result of the UN’s COP meetings? a. The Kyoto Protocol b. The Paris Agreement c. The Copenhagen Accord d. The Berlin Mandate e. All of the above - and names matter. Accord, in particular: it means serious lack of...
by trackstar
December 17th, 2021, 1:54 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

Weekend Special

More mathematical mysteries tomorrow.  
birchesinsnow.jpg
For now, singing bowls and snow is on the way. : )


by trackstar
December 17th, 2021, 1:25 am
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

Supplement: An epic thread here from 2005-2020 - just looked it up and no one has posted on it for over a year. Global Warming - What We Can Do (Mitigation) There are several related threads kicking around too, but this was the catch-all repository. Thanks to the OP there, JWD, who was and is seriou...
by trackstar
December 17th, 2021, 1:05 am
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

2.1(bonus).  What important greenhouse gas is missing from these lists?  
Dihydrogen monoxide?
Haha! Water vapor, yes and some of you might say hot air too!

Deniers.... I miss ppauper every day here.
by trackstar
December 16th, 2021, 9:36 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 18, 2021 Going Green! So, why would I say a thing like that to the nice people here? ? ) Because no one here is likely to be Net-Zero yet! Though some are making a great effort.  A Little Carbon Quiz 1. Which of the following were the result of the UN’s COP meetings? a. The Kyoto Protocol ...
by trackstar
December 16th, 2021, 6:53 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 17, 2021

Naughty and Nice
naughtylibrarian.jpg
For every action, there is an equal and opposite reaction.

So we go from pious monasticism to... well, whatever!

Most of you do deserve coal in your stockings, and that is hot in itself - net-zero emissions be damned!
by trackstar
December 15th, 2021, 9:13 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

December 16, 2021 Yesterday, I promised some illumination and here it is. Illuminated Manuscript and Gregorian Chants - A little light as we approach the darkest time of the year https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Malnazar_-_Decorated_Incipit_Page_-_Google_Art_Project.jpg/800...
by trackstar
December 15th, 2021, 8:09 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 6322

Re: Advent Calendar 2021 (for the OT)

Whenever I try to read the descriptions of most of these Millennium problems, I am reminded of a cute quote: The beginner should not be discouraged if he finds that he does not have the prerequisites for reading the prerequisites -- P. Halmos Haha - good and for you at least it is probably like the...