6 questions, easy to hard, then Ivy's pick. Here is every answer, and why.
Answer: Sydney. Opened in 1973, ten years late and fourteen times over budget. Utzon resigned mid-project and never saw the finished building in person.
Answer: Concorde. The Soviet Tu-144 flew passengers briefly but was withdrawn. Concorde crossed the Atlantic in under three and a half hours until 2003.
Answer: False. Both have exactly seven; the giraffe's are just up to 25 cm long each. Almost all mammals have seven, from mice to whales; sloths and manatees are the odd ones out.
Answer: It produces toxic chloramine gas. Bleach plus acids such as vinegar is also dangerous, giving off chlorine gas. The rule is simple: bleach gets mixed with water and nothing else.
Answer: Cottingley Fairies. Arthur Conan Doyle, a convinced spiritualist, published them as proof. In 1983 the cousins, by then in their eighties, admitted the fairies were paper cut-outs held up with hatpins.
Answer: It is too low in water and too acidic for microbes. Edible honey has been found in 3,000-year-old Egyptian tombs. Bees fan nectar to below 18% water, and the sugars pull water out of any microbe.
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