Results for "History"
Found 41 results
How Jonas Salk used formaldehyde to freeze the polio virus in 1954, training the immune system with…
In 1774, Joseph Priestley abandoned open flames and used a giant burning lens to isolate pure air, …
How William Thomson used a suspended mirror and light beam to read faint telegraph signals across t…
How two physicists ditched traditional lenses in 1981 to map individual atoms using quantum tunneli…
In 1351, Jia Lu used a bamboo tube and a simple 1:200 slope to tame the Yellow River and save the G…
A Ming Dynasty mountain warden uses river stones and simple math to solve a deadly tiger conflict, …
In 990 AD Baghdad, a mathematician solved a violent merchant dispute by mapping profit shares on a …
A fourth-century magistrate counts ten village homes to find nine abandoned, revealing a stark nine…
In 1666, Isaac Newton used a single prism to split sunlight at Woolsthorpe Manor. His simple experi…
Trapped in Xingyang, Chen Ping used carved wooden rods to map a six-step dependency chain, turning …
In 330 AD, astronomer Yu Xi used a bamboo rod and a charcoal line to prove the sky drifts one degre…
In 85 AD, astronomer Jia Kui broke a thousand-year myth of uniform motion using bronze beads and ea…