History of science
Son of the soil
Danish polymath laid the groundwork for modern geology.
It is rocket science
A self-taught schoolmaster seeded and boosted Soviet spaceflight.
Memory in motion
An obsolete storage form led to computers.
Star spotter
A Scottish immigrant, once a housekeeper, found hundreds of celestial objects.
Seeds of hope
Soviet agronomist who endured persecution set up the world's oldest seed bank.
