X-Ray+evidence

X-ray is a form of electromagnetic radiation, similar to light but of shorter wavelength and capable of penetrating solids and of ionizing gases.
 * Because x-rays can travel through solid material and affect photographic plates, they are widely used in diagnosing medical problems.
 * Objects in the sky also send out x-rays in processes that use very high energy.

Rosalind Franklin
 * She used x-rays to get information about structure of DNA
 * As a result - there is a x-shape patter in the photograph and that shows DNA is twisted instead of one straight line
 * Angel of X, there is two strains instead of one
 * Nitrogenous bases are near the center of the molecule