Science isn’t a product, it’s a process. Consider the act of solving a crossword puzzle – the more clues you solve, the more overlapping letters you discover, and the easier it becomes to fill in the rest of the words. That’s how scientific knowledge is accumulated, but it’s not a simple process.

Reaching scientific consensus on any given topic involves making observations, asking questions, posing hypotheses, rigorous and stringent experimentation, publishing and peer-reviewing academic papers, scholarly debate, scientific conferences...

But there is no “right answer”. All science is inherently uncertain, and what scientists try to reach is the smallest possible degree of wrong – something biochemist and writer Isaac Asimov explored in his work, The Relativity of Wrong.