Multiple choice general knowledge math & puzzles

What groovy item was invented by Englishman Edward Craven Walker in 1963?

  1. Leisure suit

  2. Lava lamp

  3. Eight-track tape deck

  4. Hot comb
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Edward Craven Walker, an Englishman, invented the lava lamp in 1963. The lamp was originally called the 'Astro Lamp' and became an iconic symbol of 1960s psychedelic culture. It works by heating a colored wax mixture in a liquid, creating the distinctive flowing lava-like motion as it rises and falls.

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