Editorial collection
Unexpected, visual, and carefully checked scientific facts — from the length of DNA to the remarkable machinery of living cells.
4 articles
01Alaskan wood frogs remained frozen for an average of 193 days and survived temperatures as low as −18.1°C. High tissue glucose levels, possibly built up through repeated freeze–thaw cycles, may help protect them.
02The reflective layer behind a reindeer’s retina is gold-turquoise in summer but turns deep blue in winter. The change comes from a reorganization of collagen fibres that tunes this biological mirror to Arctic twilight.
03Bernhard Zondek helped turn early pregnancy from a clinical suspicion into a laboratory finding. His mouse bioassay detected hormonal activity in urine and established the principle behind modern pregnancy tests.
04Almost every human cell contains about two metres of DNA. How does the cell pack this enormous molecule into a microscopic nucleus while keeping the right genes accessible?
