Weird Fact about Speed of Light - Have you know the slowest speed of light?

Weird Fact about Speed of Light - Have you know the slowest speed of light? 

                    If you anyone asked you what is the speed of light. Everyone will answer it correctly as 300000 km/s or 300000000 m/s. and we will give additional information as light is the fastest in the world.

                 But the exact value is 299792458 m/s. Because we following it as 300000000 m/s from our school days onwards.

                The Weird fact is, it is not necessary that all time light can travel in the same speed sometimes it might be less. The slowest speed of light ever recorded is just 38 mph. It is just 61.1551 kmph.