Time Machine
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.
Nerves of steel
An intrepid Italian scientist discovered the key factor in nerve growth.
