Why red algae can live deeper underwater

Red algae can live deeper by using blue-green light

Red light disappears quickly underwater, while blue-green light reaches much deeper. Red algae can use this deeper-reaching light for photosynthesis, allowing them to live at depths where many green plants are less effective.

Britain held power beyond the lands it ruled

Britain’s control of global trade and the seas gave it influence far beyond the territories it formally ruled. In parts of Asia and Latin America, it could shape economies and enforce its interests without making those places formal parts of its empire.

A sea route to India weakened Venice

Vasco da Gama's 1497–1499 voyage opened a route to India around the Cape of Good Hope. Venice's oared ships were poorly suited to ocean crossings, leaving the city behind in the race for colonies.

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Why red algae can live deeper underwater

Red algae can live deeper by using blue-green light

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