Famous discoveries
29 medias
The Origin of Calendars
Leap year
The Story of Our Calendar
Wegener
Archimede's principle
Mendel's Experiment (monohybridism)
Sink or float?
Pulleys
Longitude - Latitude
Velocipede - High wheel - Bicycle
Free fall #1
Mendeleev periodic table
Epicycles theory
Locks
PV=nRT
Eratosthenes experiment
Gears
Hydraulic lift
Galvanic cell
ITER
AC motor
Gene cloning
Radioactive decay #1
fullerene - nanotube
Microscope
Digital Analog Converter
Analog Digital Converter
Crookes Tube
Chappe Telegraph