I wouldn’t go anyways, but given that I suspect that signs in support of Nuclear Energy or Genetically Modified Organisms would both be frowned upon, that it’s probably more a march for Liberals than Science, and there’s enough of those already.
Of course, I might be wrong on that. But I’d rather see scientifically minded politicians than protesters, so I’d still hold my enthusiasm until I can vote for science.
Just got back from the one in Oxford, MS. There were probably 250 or 300 people there, which I guess is pretty good for a town of 21,000 people in the middle of the Bible Belt.
I don’t know how many people were in Cleveland. Seemed like a lot but I don’t know how to judge a crowd!
I was there with two people who are stilts performers so for an hour during the speakers I helped the stilts people walk around the crowd and get their pictures taken.
After that it was march time and it was pretty quick. And quiet. The organizers had volunteers dispersed in the crowd to get us to chant but everyone was keeping silent. A friend who was on the organizers team said they were afraid that we’d be quiet and they were right!
The March took like an hour. We were fast and efficient.
The signs I saw were all hilarious and uplifting. There was one Trump effigy there but the organizers were ignoring it.
I look forward to seeing photos of all the marches today and seeing more awesome signs.
We’re nerds, we’re wet,
we’re really, really upset!
I got off the Metro at L’Enfant Plaza shortly before noon, and walked up to the Monument grounds. The rain was at its worst probably between noon and 12:30 or so, then it eased off. At that point, there was a lot of speechifying, so I wandered up to the Lincoln Memorial and the Korean War Memorial before heading back to the Monument grounds, getting back maybe 1:45, just before we started to march. And after that, I was having a good enough time that I didn’t care about the rain. It was geek heaven.
What do we want? Science!
When do we want it? After peer review!
You would have been wrong - it was a very diverse crowd. It was also cold and wet. I was soaked, and had to leave just before the actual marching started. I was chilled, and had to keep moving to stay warm. A great day, none the less!
The march in Fullerton was well attended, and at least six different people asked about my “45*<0” sign.
Forty-five referring to the current POTUS, the asterisk to indicate his illegitimacy, and ‘less than zero’ for his negativity.
I went to the Boston rally. It was extremely wet, with lots of good signs. The kids’ programming was pretty good, considering the hardships they labored under.
My wife, a nurse scientist, was able to march in two states!
She was at a conference in Denver and participated in the march there before getting on a plane home. She was able to briefly get in on the march in Spokane WA after landing.
I marched in Nashville. Local paper estimates 4,000–pretty good for a miserable rainy day.
Went to the march in Portland. Great crowd!
Also, in Portland, As a bonus, it had been raining all morning, but God stopped the rain just in time and didn’t start it again until the march was almost over. 
Tom Scud and I marched in Chicago. It as awesome! Dancing T. Rex, we ran into his cousin and multiple other people we knew - very upbeat crowd. Most attendance estimates I’ve seen were in the 40,000 range. Not like the Women’s March, but nothing to sneeze at, either.
The nerdy signs were awesome! Chant of the day: “hey, Trump, have you heard? You can’t silence every nerd!”
And then there was the marching band in lab coats, with undefined dancing creatures on stilts.
My daughter and I marched locally.
Got a bit too chilled and my joints are aching like crazy, but otherwise had a wonderful time. I left the Washington Monument early to search for something warm to drink and someplace protected to dry out a bit. Joined the March as everyone came down Constitution. Like with the Women’s March, I feel very inspired. But I think I’ll go to the Princeton sister march for Climate Change next Saturday rather than come back to DC.
We’re nerds, we’re wet,
we’re really, really upset! - loved that chant! 
I went in San Diego. Beautiful, sunny day - our local PBS station estimated crowd at 15,000+. Definitely a lot of people, lots of kids and families, stopped traffic honking energetically - it was really fun. More pro-science than anti-Trump although that was represented as well. There were no counter protesters that I saw. Favorite sign: Think while it’s still legal.
My son reported via Skype chat that the march in Philly was great, and that he has a photo to send us of him wearing a lab coat in the march. But has he sent us the photo yet? No…I’m going to berate him for that.
I went to the DC march. Despite the rain and the chill, I stuck it out and had fun. My sign read “I’m a mad scientist!” The energy was great even with the bad weather.
Some of my favorite signs from yesterday (I just finished looking through my photos):
Keep Earth clean! It’s not Uranus
What do we want? Evidence-based policy! When do we want it? After peer review!
Science doesn’t care what you believe
The end is NIH
Science is not your enemy - willful ignorance is
(on the back of a sign) I’m a science teacher - I have eyes in the back of my sign
Make America smart again! Support evidence-based science
I would rather have questions that can’t be answered than answers that can’t be questioned
So bad, even introverts are here
We can lead a politician to science, but now let’s make him THINK
Dunning-Kruger Effect: thank you, science!
Evidence over ignorance
When did the simple concept of leaving the planet a better place for our kids become a partisan issue?
Time to react! (hand holding a beaker of chemicals)
Trust in science: it works, bitches!
How do I get back to the control timeline?
Up & Atom! Time to march for science
I have a Hadron for science
Take chances, make mistakes, get messy, science matters - Ms Frizzle
Demonstrate scientific literacy to Invalidate demogogic idiocy
There is no Planet B
Keep your theology off my biology
Less invasions, more equations
Keep America strong, support science
Stupid and ignorant is a luxury we cannot afford
Look at all these nerds - it’s beautiful!
On a single sign:
Science, always making America great:
Remember polio, NO? Thank science
Remember smallpox, NO? Thank science
Love your cellphone? Thank science
Is your blood pressure under control? Thank science
(That last line: I know, whose blood pressure is under control these days?)
The signs were a definite highlight. I have a deeper understanding of why people do cosplay now. I got to be in so many people’s selfies just because of my sign. I enjoyed getting random thumbs-up and smiles from people. Let’s do it again!
I like the references to the placebo march.
Brian