Ants, Cells & Atoms Life and matter below the width of a hair. https://antscellsandatoms.com/ 2026-10-25T00:00:00Z Ants: Strong for Their Weight, Mostly Because They're Smallhttps://antscellsandatoms.com/insects/ant-strength/2026-10-25T00:00:00ZIn the lab, seed-harvester ants carried loads up to 6 times their mass and leaf-cutters bit with about 2,000–2,800 times their weight, mostly due to small size.Ants, Cells & Atoms Acetylsalicylic Acid: A Form Made in 1853, 'Aspirin' in 1899https://antscellsandatoms.com/molecules/aspirin/2026-10-25T00:00:00ZA form of acetylsalicylic acid was made in 1853 and a pure one by 1859; Bayer named it Aspirin in 1899. Who at Bayer made it pure was still disputed in 2015.Ants, Cells & Atoms How Small Is an Atom? For Most Elements, About 0.1–0.5 nmhttps://antscellsandatoms.com/scale/atom-size/2026-10-25T00:00:00ZAtoms of most elements are about 0.1–0.5 nm across, depending on where the edge is drawn, so a typical 50–100 µm hair spans 100,000 to a million of them.Ants, Cells & Atoms Bacteriophage T4: About 57 µm of DNA in a Head 0.12 µm Longhttps://antscellsandatoms.com/microscopic-life/bacteriophage/2026-10-25T00:00:00ZPhage T4's head, 120 by 86 nm, is narrower than a standard light microscope can resolve, yet it packs a genome about 57 µm long. How it fits, how it gets out.Ants, Cells & Atoms Baker's Yeast: Each Bud Leaves a Scar on the Mother Cellhttps://antscellsandatoms.com/microscopic-life/bakers-yeast/2026-10-25T00:00:00ZBaker's yeast cells run 3.6–11.0 µm across in one lab strain. Each bud leaves a ring scar of chitin on the mother, so the scars count its daughters.Ants, Cells & Atoms Borrowed Color: When a Micrograph's Hue Isn't the Cell's Ownhttps://antscellsandatoms.com/microscopic-life/borrowed-color/2026-10-25T00:00:00ZBorrowed color is color in a micrograph that does not belong to the organism: a stain, a fluorescent marker, or false color added to a grey image.Ants, Cells & Atoms Brownian Motion: Why a 1 µm Bead in Water Never Sits Stillhttps://antscellsandatoms.com/scale/brownian-motion/2026-10-25T00:00:00ZBrownian motion is the jiggle of small particles hit unevenly by moving molecules. A 1 µm bead in water at 20 °C spreads about 0.9 µm along one axis a second.Ants, Cells & Atoms Bumblebee Flight: Why the 'Can't Fly' Sum Fell Shorthttps://antscellsandatoms.com/insects/bumblebee-flight/2026-10-25T00:00:00ZBy later accounts, the 1934 sum saying bumblebees can't fly used fixed-wing theory. In free-flight studies their wings beat about 130–200 times a second.Ants, Cells & Atoms Compound Eye: One as Sharp as Yours Would Span About 7–12 mhttps://antscellsandatoms.com/insects/compound-eye/2026-10-25T00:00:00ZA 290 µm wasp's compound eye has 29 facets; dragonflies have up to 30,000. Fruit-fly, honeybee and German wasp lenses are 15–29 µm; narrower ones blur more.Ants, Cells & Atoms Diatoms: Why Most Glass-Walled Algae Shrink as They Multiplyhttps://antscellsandatoms.com/microscopic-life/diatoms/2026-10-25T00:00:00ZDiatoms are single-celled algae in glass walls, 2–2,000 µm across species. Each new wall half forms inside an old one, so most lineages shrink as they divide.Ants, Cells & Atoms How Long Is DNA? About 2 m per Diploid Human Nucleushttps://antscellsandatoms.com/scale/dna-length/2026-10-25T00:00:00ZStretched out, the DNA in one diploid human nucleus is about 2 m (2.0–2.4 m by two routes), yet 84% of a reference man's cells, the red blood cells, carry none.Ants, Cells & Atoms Foraminifera: Single Cells Known for Shells, Some Coin-Sizedhttps://antscellsandatoms.com/microscopic-life/foraminifera/2026-10-25T00:00:00ZForaminifera are single cells known for their shells. One drifting species has adult shells of 150–1,500 µm; fossil Nummulites in a pyramid block reach 30 mm.Ants, Cells & Atoms How Big Is a Cell? Most Are a Hair's Width or Far Narrowerhttps://antscellsandatoms.com/scale/how-big-is-a-cell/2026-10-25T00:00:00ZMost cells are about 0.4–100 µm across. Single cells run from bacteria about 0.2 µm wide to an ostrich egg; a human axon or a many-nucleus alga can pass 1 m.Ants, Cells & Atoms How Do Insects Breathe? Through Air Tubes, Not Lungshttps://antscellsandatoms.com/insects/how-insects-breathe/2026-10-25T00:00:00ZInsects have no lungs: air enters at spiracles and runs down branching tubes almost to the cells. Why diffusion demands that, and the giant-insect debate.Ants, Cells & Atoms How Many Cells in the Human Body? About Half Are Bacteriahttps://antscellsandatoms.com/scale/how-many-bacteria-in-the-human-body/2026-10-25T00:00:00ZA 70 kg reference man holds about 3.0×10¹³ human cells and about 3.8×10¹³ bacteria, so bacteria are roughly half the cells in the body, within 25% uncertainty.Ants, Cells & Atoms