Earth's Radio Bubble: How Far Have Human Voices Traveled into Space?

• Human radio signals have been spreading into space for over 100 years, forming an 'Earth Radio Bubble'.
• These signals, initially for Earth communication, travel at the speed of light beyond our planet's boundaries.
• The 'Earth Radio Bubble' is an expanding sphere of human-generated radio waves, not a physical structure.
• Signals weaken and become fainter with increasing distance, posing a question about their true reach.
• The journey began with Reginald Aubrey Fessenden's first public radio broadcast in 1906.

Why It Matters: Our radio signals have created an expanding 'bubble' in space, raising questions about their reach.