Lethal overdose can be defined as the dose which is an indication of the lethal toxicity of the given substance. It can be defined as the dose of substance above which it is considered lethal.
The lethal dose for heroin is 20 mg above which it can be deadly for a number of people.
There are chances that some people might not die because the effect varies from person to person.
Cast fossils are the type people are most familiar with, as they make up the spectacular dinosaur skeletons that on view in museums. Cast fossils occur when minerals deposit into the mold left by the rotting organic material, resulting in a three-dimensional replica of the hard structures of the plant or animal
