Tag: iron
For Mankind, the Leap from Copper to Iron Was a Landmark Advance
The importance of metals, particularly iron, and the importance of the discovery of metallurgy can hardly be exaggerated.
Security Gates in the Cell
A key characteristic of life is active transport: control over what enters and exits the cell. Closer looks reveal exquisite “selectivity filters” with moving parts that make active transport work.
Walnuts: Intelligent Design in a Nutshell — Literally
Walnut shells are found to create 3-D puzzles with tissues that even toothy squirrels can’t easily crack.
Astrobiology: Searching for the Origin of Life, In All the Wrong Places
Astrobiologists think they may have found where life came from — cyanide in meteorites!