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The day Machu Picchu was discovered – level 2
24-07-1911Around 1450, the Incas built a city high in the Andes,...
The day Machu Picchu was discovered – level 3
24-07-1911Around 1450, the Incas built a city high in the Peruvian...
The day HIV was discovered – level 1
23-04-1984In 1981, five men from Los Angeles have a strange disease....
The day HIV was discovered – level 2
23-04-1984In 1981, doctors found that five men from Los Angeles had...
The day HIV was discovered – level 3
23-04-1984In 1981, five men from Los Angeles were reported to have...
The day John Adams moved into White House – level 2
01-11-1800On November 1, 1800, President John Adams moved into the newly...
The day John Adams moved into White House – level 3
01-11-1800On November 1, 1800, President John Adams, in the last year...
The day the light bulb was invented – level 1
21-10-1879People do the first experiments with electric light at the beginning...
The day the light bulb was invented – level 2
21-10-1879The first experiments with electric light were made in the early...
The day the light bulb was invented – level 3
21-10-1879The first experiments with electric light were carried out in the...
