Letter included on Voyager I spacecraft, the first man-made object to reach interstellar space.

Letter included on Voyager I spacecraft, the first man-made object to reach interstellar space.

(Source: orage)

First you get the doctorate, then you get the scientist job, then you get to tickle rats at work.
How do we know that the rats actually enjoy it and are not just squeaking in anguish and confusion? Well, first they conditioned the rats to be afraid of a certain audio tone — the rats would freeze up and become nervous whenever the sound was played. But then, if they tickled the rats beforehand, the rats showed less physical and hormonal signs of fear when they heard the sound.

First you get the doctorate, then you get the scientist job, then you get to tickle rats at work.

How do we know that the rats actually enjoy it and are not just squeaking in anguish and confusion? Well, first they conditioned the rats to be afraid of a certain audio tone — the rats would freeze up and become nervous whenever the sound was played. But then, if they tickled the rats beforehand, the rats showed less physical and hormonal signs of fear when they heard the sound.

(via cracked)

(Source: great-gif)

coolsciencegifs:

LED Light in Liquid Nitrogen
 When an LED is immersed in liquid nitrogen, the electrons lose a lot of thermal energy, even when the light isn’t turned on. When this happens, the bandgap in the semiconductors increases. Since this gap is increased, when electrons in the conduction band fall to the valence band, they emit a higher energy light, meaning the light emitted has a shorter wavelength and a higher frequency. This is why we see the orange light turn into colours that are higher on the electromagnetic spectrum when it is frozen in the liquid nitrogen.source

coolsciencegifs:

LED Light in Liquid Nitrogen

 When an LED is immersed in liquid nitrogen, the electrons lose a lot of thermal energy, even when the light isn’t turned on. When this happens, the bandgap in the semiconductors increases. Since this gap is increased, when electrons in the conduction band fall to the valence band, they emit a higher energy light, meaning the light emitted has a shorter wavelength and a higher frequency. This is why we see the orange light turn into colours that are higher on the electromagnetic spectrum when it is frozen in the liquid nitrogen.

source