Credit: Tufts University
Via Medical Xpress:
A fluid-to-solid “jamming” transition, seen in materials like glass and foams, has been observed in the developing tissues of zebrafish embryos. Cells in the elongating tail (yellow) “melt apart” to become more pliable but stay packed like a solid further up the body to fix changes in place.
Credit: Brian Long, UC Santa Barbara College of Engineering
Via Quanta Magazine: ‘Traffic Jams’ of Cells Help to Sculpt Embryos – By measuring mechanical forces inside an embryo for the first time, researchers have shown how a physical “jamming” mechanism assists development.
2018 Nikon Small World in Motion Competition
Above my favorite (second place):
I recommend take a look both winning videos and honorable mentions.
Of course the winner is awesome too:
Zebrafish embryo growing its elaborate sensory nervous system (visualized over 16 hours of development). Technique: Selective Plane Illumination Microscopy (SPIM). Dr. Elizabeth Haynes – Jiaye “Henry” He. University of Wisconsin – Madison
Very appropriate, if you ask me.
Seen at Trust me, I’m a “Biologist”
The stages of regrowth for a salamander leg. The intact limb is at the left; the series to the right shows the gradual regeneration of the limb over a couple of months. (Credit: James Monaghan laboratory/Northeastern University)
Via Quanta Magazine: Salamander’s Genome Guards Secrets of Limb Regrowth
The axolotl, the lost body parts regeneration champion among vertebrates.
Credit: 2018 EPFL
EPFL researchers have developed an innovative label-free method for studying the behavior of single cells continuously and in real time. By placing a cell in a small chamber containing nanosensors and observing it over many hours, it is possible to identify the cell’s unique personality and understand how it communicates. This powerful new technology could be used to select the most aggressive cells to combat an enemy. Potential applications include treatments for cancer and autoimmune diseases.
Sea turtles ultimately grow from the size of a dinner plate to that of a dinner table. In the case of the leatherback sea turtle, this can take up to a decade. Happy World Turtle Day!
From the TED-Ed Lesson The survival of the sea turtle – Scott Gass
Animation by Cinematic Sweden
Whiskered Prowfish (Neopataecus waterhousii)