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Hace 3 días · Corbiculate bees—those that possess corbicula, or pollen baskets, on their hind legs—encompass honey bees, stingless bees, bumble bees, and orchid bees. Among them, honey bees and stingless bees are the only groups with highly complex social behaviors, such as forming large colonies with queens, workers, and drones. Bumble bees display less complex sociality, and orchid bees are mostly ...
Hace 4 días · Black Sea. Black Sea, large inland sea situated at the southeastern extremity of Europe. It is bordered by Ukraine to the north, Russia to the northeast, Georgia to the east, Turkey to the south, and Bulgaria and Romania to the west. The roughly oval-shaped Black Sea occupies a large basin strategically situated at the southeastern extremity of ...
Hace 1 día · It included territories in Europe, North Africa, and Western Asia and was ruled by emperors. The fall of the Western Roman Empire in 476 AD conventionally marks the end of classical antiquity and the beginning of the Middle Ages . Rome had expanded its rule to most of the Mediterranean and beyond.
Hace 2 días · Africa. Africa is the world's second largest and second-most populous continent after Asia. At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth 's land area and 6% of its total surface area. [7] With 1.4 billion people [1] [2] as of 2021, it accounts for about 18% of the world's human ...
Hace 2 días · Pollen data indicate a warm period culminating between 17,000 and 13,000 BP followed by cooling between 13,000 and 11,500 BP. [41] Coastal areas deglaciated rapidly as coastal alpine glaciers, then lobes of Cordilleran ice, retreated. The retreat was accelerated as sea levels rose and floated glacial termini.
Hace 2 días · t. e. The history of Africa begins with the emergence of hominids, archaic humans and — around 300,000–250,000 years ago — anatomically modern humans ( Homo sapiens ), in East Africa, and continues unbroken into the present as a patchwork of diverse and politically developing nation states. [1]
