Sea cucumbers can eviscerate themselves as a defense mechanism.
When using a microscope to study particularly small organisms, placing a drop of immersion oil on top of the slide cover will focus the light from the microscope and further magnify the specimen.
Rosalind Franklin died of ovarian cancer six years after using x-ray diffraction to identify the physical structure of DNA. Other people were awarded a Nobel Prize for her discovery; there is a very strict rule that a Nobel Prize cannot be given to someone who is dead. It isn’t like the Oscars. Her cancer was probably caused in part by excessive exposure to radiation.
A sound occuring below the frequency of twenty Hertz–the lowest sound usually detectable by the human ear–is referred to as infransound. Infrasonic noises may cause pain in the eardrum, and/or inexplicable feelings of dread.
When trying to identify which chamber of a human heart you are observing, it is helpful to know that the atria have smooth walls, whereas the ventricles’ are textured, and that the walls of the heart are much thicker on the left side than on the right.
Eels have not been observed spawning in nature.
The oldest confirmed wild bird is approximately sixty-six years old; her name is Wisdom and she has flown more than three million miles.
Human beings can also eviscerate themselves as a defense mechanism, but this is often called an Emotional Disturbance.