Humans begin using yeast to make bread, perhaps in Ancient Egypt
Baker’s yeast is the common name for the strains of yeast commonly used as a leavening agent in baking bread and bakery products.
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Humans invent lost-wax casting, perhaps in modern-day Pakistan
Lost-wax casting is the process by which a duplicate metal sculpture (often silver, gold, brass or bronze) is cast from an original sculpture.
Humans of the Yangshao period in China produce silk for the first time
According to Confucian text, the discovery of silk production dates to about 2700 B.C.E., although archaeological records point to silk cultivation as early as the Yangshao period (5000-3000 B.C.E.).
The Funnelbeaker culture flourishes in north-central Europe
The Funnelbeaker culture developed as a technological merger of local neolithic and mesolithic techno-complexes, introducing farming and husbandry as a major source of food to the pottery-using hunter-gatherers north of this line.
Hunter-gatherers of the Wilton stone age culture inhabit Twyfelfontein in modern-day Namibia
Displaying one of the largest concentrations of rock petroglyphs in Africa, UNESCO approved Twyfelfontein as Namibia’s first World Heritage Site in 2007.
The Kura–Araxes culture thrives in the Caucauses
The Kura–Araxes culture was a civilization that existed from about 4000 B.C.E. until about 2000 B.C.E. The earliest evidence for this culture is found on the Ararat plain; it spread northward in Caucasus by 3000 B.C.E.
The peoples of sub-Saharan Africa begin metal smelting
Copper artifacts recovered from Nubia provide the earliest known evidence of metal smelting in sub-Saharan Africa, dating back sometime after 4000 B.C.E. – they were most likely imports from Egypt.
Humans settle on the Macau Peninsula for the first time
The human history of Macau stretches back up to 6,000 years, and includes many different and diverse civilizations and periods of existence. Evidence of human and culture dating back 4,000 to 6,000 years has been discovered on the Macau Peninsula and dating back 5,000 years on Coloane Island.
The first year of the ancient Egyptian calendar commences
The ancient Egyptian calendar was a solar calendar with a 365-day year.
Humans of the Indus Valley civilization invented irrigation
Irrigation was used as a means of manipulation of water in the alluvial plains of the Indus valley civilization, the application of it is estimated to have begun around 4500 B.C.E. and drastically increased the size and prosperity of their agricultural settlements.