Light is one of the most essential elements needed for life on Earth. Not only does it serve as the primary energy source for our planet’s ecosystems, but it also drives our own biology. The human body is intricately designed to respond to light in various ways, and without it, we'd be in trouble.
Humans have nonetheless been known to live (and even thrive) for extended periods without sunlight, but it requires significant adaptation and also carries many mental and physical health risks.
So, what would happen to your body without sunlight? Click on to find out.