Parenting is the hardest job on the planet.

Air traffic control? Super stressful job. Brain surgeon? Not for the faint of heart. But parents take on the most relentless and challenging work on Earth every single day. Here's what makes raising humans the toughest job:

1. The responsibility is immense, and the stakes are incredibly high — yet there is no manual.

The first time you hold your baby — the weight of their entire life in your hands — it's nearly impossible not to be overwhelmed. You question whether you're adequate for the task, and the fact that you have no real idea what you're doing hits you. This is a person's life we're talking about. How did you get put in charge of a life?

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