What Is the Speed of Light? The Speed Limit of the Universe, Explained

After travelling 18 months at near speed of light,craft crashes into lake on "another planet". Due to time dilation travelling at that speed, the year is 3978. For every moment they have travelled, the Earth has aged 1 day. They have come back to Earth ruled by apes. | Kenneth Wade

Radial space lines speed of light on black background. Abstract tunnel speed of light. Travelling in open space. Dynamic concept.

Light of wavelength 5000A˚ travelling at a speed of 2×108 m/s i... | Filo

Four things you may not know about the speed of light

Speed limit of universe | Light Speed | top speed