Nightmares occur during sleep

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Decreased sensitivity to an unchanging stimulus is known as

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.