Gonadotropin-releasing hormone (GnRH) secreted from the hypothalamus regulates the secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary, and then FSH and LH act on the gonads to stimulate gonadal development and maturation.
"Overfishing and pollution have been blamed for the clam shortage, and scientists believe the harvest must be limited before the stock becomes exhausted."
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
Diffraction could have caused it. This is where a wave encounters an obstacle or a slit. It happens when there is bending of light around the corners of an obstacle. It is often described as the interference of waves according to the Huygens–Fresnel principle.