This CUPOTY-shortlisted photo by Sigfrido Zimmerman shows giant kelp drifting in the current. At the base of each blade is an inflated bladder that helps keep the algae buoyant. The blades themselves are furrowed on their surface, with patterns reminiscent of sand ripples. Though giant kelp can grow to as large as 60 meters, the species lives in constant flux, pushed and pulled by the currents that run along its length. (Image credit: S. Zimmerman/CUPOTY; via Colossal)
Month: January 2025
Holding Steady
Before a mammalian cell divides, the spindle — a protein structure — divides the cell’s genetic material in two. As it does, the cytoplasm inside the cell forms a toroidal flow (below, left). Researchers wondered how the spindle manages to stay in place with this flow; the spindle sits just where the flow diverges, a spot that seems ripe for unstable shifts in position. But, contrary to expectations, their analysis showed that — although a smaller spindle would be unstable in that spot — the protein spindle is large enough that its size distorts the cell’s flow and creates a pressure that moves it back into place if it shifts. (Image credit: top – ColiN00B, illustration – W. Liao and E. Lauga; research credit: W. Liao and E. Lauga; via APS Physics)
Left: illustration of the toroidal flow near the spindle (purple) in a cell. Right: schematic of flow near the spindle’s fixed point. Fediverse Reactions
-
The Best of FYFD 2024
Welcome to another year and another look back at FYFD’s most popular posts. (You can find previous editions, too, for 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, and 2014. Whew, that’s a lot!) Here are some of 2024’s most popular topics:
- The Taum Sauk Dam Failure and Its Legacy
- Stretching Ant Rafts
- Gigapixel Supernova
- Feynman’s Sprinkler Solved
- Calming the Waves
- “Dew Point” Deposits Droplets
- Drying Unaffected by Humidity
- Trapped in a Taylor Column
- Exciting a Flame in a Trough
- Remembering Rivers Past
- A Comet’s Tail
- Light Pillars
- Liquid Metal Printing
- The Miscible Faraday Instability
- A Triangular Prominence
This year’s topics are a good mix: fundamental research, civil engineering applications, geophysics, astrophysics, art, and one good old-fashioned brain teaser. Interested in what 2025 will hold? There are lots of ways to follow along so that you don’t miss a post.
And if you enjoy FYFD, please remember that it’s a reader-supported website. I don’t run ads, and it’s been years since my last sponsored post. You can help support the site by becoming a patron, buying some merch, or simply by sharing on social media. And if you find yourself struggling to remember to check the website, remember you can get FYFD in your inbox every two weeks with our newsletter. Happy New Year!
(Image credits: dam – Practical Engineering, ants – C. Chen et al., supernova – NOIRLab, sprinkler – K. Wang et al., wave tank – L-P. Euvé et al., “Dew Point” – L. Clark, paint – M. Huisman et al., iceberg – D. Fox, flame trough – S. Mould, sign – B. Willen, comet – S. Li, light pillars – N. Liao, chair – MIT News, Faraday instability – G. Louis et al., prominence – A. Vanoni)
Fediverse Reactions
