September 7, 2026
by Jonathan Tweet
Comments Off on Grandmother Fish poster is here!
Karen and I are excited to announce that a poster version of the evolutionary family tree is now available around the world through print-on-demand. People have been asking for this poster for over 10 years, and it’s finally here. This … Continue reading
July 10, 2024
by Jonathan Tweet
Comments Off on 10 Years Ago: Grandmother Fish on Kickstarter
Ten years ago, Karen and I ran a successful Kickstarter campaign for Grandmother Fish. We asked for $12k, we were counting on hitting $20k, and we reached $36k, with over a thousand backers. The money from the pledges allowed me … Continue reading
June 6, 2024
by Jonathan Tweet
Comments Off on 10 Years Ago: Karen Lewis
Ten years ago, I teamed up with Karen Lewis to create Grandmother Fish. I was looking for an artist, and Karen turned out to be much more than that. She’s an experienced children’s science illustrator, and she’s a mom, so … Continue reading
May 27, 2024
by Jonathan Tweet
Comments Off on Why are the planets in a line?
Here’s a science question for y’all to pose to your kids: Why do the planets, moon, and sun always appear in a line? Why don’t they sometimes form triangles or rectangles like stars do? If your kids like outer space, … Continue reading
May 21, 2024
by Jonathan Tweet
Comments Off on 10 Years Ago: The light in parents’ eyes
Ten years ago, I decided to make Grandmother Fish a physical book and to raise money for it on Kickstarter. In the fall of 2013, I figured I would self-fund a digital version of the book, and that way I … Continue reading
March 28, 2024
by Jonathan Tweet
Comments Off on Grandmother Fish in Tel Aviv
The story of Grandmother Fish is everybody’s story, and that’s why scientists and kids from around the world respond to it. Dr. Ilil Pratt of the Steinhardt Museum of Natural History in Tel Aviv fell in love with it, and … Continue reading
February 3, 2024
by Jonathan Tweet
Comments Off on Jupiter in the Evening
This February, it’s easy to spot Jupiter in the night sky and point it out to kids. Helping them learn to spot Jupiter is an easy way to help kids see our place in the solar system. You can see … Continue reading
September 11, 2023
by Jonathan Tweet
Comments Off on 10 Years Ago: Grandmother Fish’s Eureka Moment
Ten years ago, after I got back from Burning Man 2013, I had a eureka moment and realized how I could make my kids’ book really work. This was just after I was squeezed out of my last corporate job, … Continue reading
April 6, 2023
by Jonathan Tweet
Comments Off on Clades Solo Updated & Free
A new, free version of the Clades Solo app is now available on Apple, Android, and Amazon. Match animals by their evolutionary histories and see how fast you can play through the deck! The new version adds the standard 12-card … Continue reading
June 27, 2022
by Jonathan Tweet
Comments Off on Crow Scientist in Persian
Crow Scientist is now available in Persian (Farsi)! In March, Nasser Yousefi of DONYA Children’s Research Institute contacted Dr Marzluff about translating our app into Persian. The institute works on early childhood education and development in Iran. They have been … Continue reading