Four evenings a year, the setting sun aligns perfectly with Manhattan’s street grid, creating a breathtaking wash of illumination along the cross streets, and tonight is one of them! In this video, Frederick P. Rose Hayden Planetarium Director Neil deGrasse Tyson, who first noted the phenomenon more than a decade ago and coined the term “Manhattanhenge,” explains the phenomenon.
That one time my roommate couldn't watch Shane's Asagao Academy stream so I live-texted it to her instead.
@didyouknowshaning‘s asagao stream part 1/part 2
“Conclusion: Big helix in several chains, phosphates on outside, phosphate-phosphate inter-helical bonds disrupted by water. Phosphate links available to proteins.” — Rosalind Franklin
Underlined in typewritten lecture notes, with handwritten annotations, as report (7 Feb 1952) on ‘Colloquium November 1951’. As given in Anne Sayre, Rosalind Franklin and DNA(1975), 128.
A Living Cage
The typical eukaryotic, which basically covers every cell found in animals, plants, fungi, slime molds, protozoa and algae, is a packed place, crammed with a nucleus (itself containing six feet of tightly wound DNA), mitochondria, centrosomes, peroxisomes, lysosomes, ribosomes, endoplasmic reticula (both smooth and rough), actin filaments, Golgi vesicles and more.
All of these cellular elements are in constant action, buzzing with communication and the movement of molecules. The image above, produced by Maria Voigt at the RCSB Protein Data Bank, depicts a clathrin cage, which is essentially a little basket for carrying and moving things around inside cells. Clathrin derives from the Latin clatratus, which means lattice.
Cells have a lot of them. They’re used to transfer nutrients, import signaling receptors, mediate an immune response after sampling the world outside the cell and the clean-up of cellular debris. When not in use, the cages are broken up, to be reassembled when next needed.
The cage above is roughly 50 nanometers wide, a size almost too small to imagine. By comparison, there are 25.4 million nanometers in an inch. A sheet of paper is roughly 100,000 nanometers thick. A single strand of human DNA is 2.5 nanometers in diameter.
The image is one of this year’s winners of the Wellcome Image Awards.
A snake story, based on an experience I had while I was in Florida.