How much bread did people usually eat before World War 1?, 1/2 a kilogram a day, When did Hurricane Katrina happen?, 2005, Which company started trying self-driving cars first?, Google, What does the nutmeg seed look like?, It's purple-brown colored, 2 to 3 cm long by about 2 cm across, How old are some qanat tunnels?, 2,700 years old, How big are microbes?, so small we can't see them, How many geoglyphs are there in England?, 56, What causes plants to react to temperature?, a molecular mechanism, Where is Oppland?, south-central Norway, When did shipbuilders start using a modern method?, in the first centuries of the current era, Where did the idea for bike-sharing come from?, Amsterdam, How much fat do polar bears have?, up to 11 inches, Who was Djoser's main official?, Inhotep, Where does Yngve Zotternamn work?, Karolinska Institute, When did scientists develop tools to study the ocean?, in the 20th century.

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