What Does It Mean To Be In The Limelight?

Most dictionaries offer two definitions of being in the limelight: on stage under the spotlight, or to be in a position of public scrutiny. But from where does this phrase originate? Limelight is the brilliant white illumination resulting from the heating of a cylinder of quicklime by an oxyhydrogen flame. The

How Old Is Planet Earth?

The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud, which began to spin and flatten out into a circumstellar disc from which the planets were born. Over the next 10–20 million years the primordial Earth was formed with its atmosphere and oceans

How Do Truth Serums Work?

Sodium amytal (amobarbital), pentothal sodium (thiopental), and seconal (secobarbital) are a collective class of barbiturate that produce a range of depressant effects from mild sedation to deep anesthesia, and are used as truth serums. Barbiturates act on higher brain functions by binding to GABA-A protein receptors which convey signals around the

How Much Heat Can The Human Body Withstand?

The human body typically maintains a healthy temperature in the range of 36.5–37.5 °C, but is affected by a range of factors including age, exertion, time of day, state of consciousness and emotional state. When more heat is produced or absorbed than the body can dissipate, body temperature will climb and