LONDON — If Charles Darwin were alive today, he might have a theory about the gift, the instinct, that separates the goal scorers from other players.

Barcelona wins in the Champions League, Lionel Messi scores.

Atlético Madrid qualifies for the next round, Diego Costa is there, again, on the scorecard.

For Chelsea, read Samuel Eto’o. For Napoli, look no further than Gonzalo Higuaín.

Some men, it would seem, are born with that wonderful ability to strike goals at the highest level. But how would you explain the run that Arsenal’s Aaron Ramsey is currently on? He has always looked like a fine player, an intelligent and energetic contributor to the midfield pattern of passing and possession that defines Arsène Wenger’s Arsenal style.

But on Wednesday, Ramsey popped up to score where no one else could. His score in the 62nd minute was a pure striker’s goal. It was stealth bordering on larceny. Ramsey appeared from the shadows and he saw, or sensed, the space and opportunity where perhaps neither should have existed.