Body Mass Index (BMI) is defined as the ratio of weight (in kg) to height (in meters) squared and is an inexact measure of body fat, though it supposedly establishes cutoff points of normal weight, overweight, and obesity.

FORBES: Why Do People Have To Lie To Us In Medical Research About The Effects Of Smoking?

The way China's diminutive Zhan Xugang mocked gravity and hoisted a 357.5 kg combined weight off the floor in the weightlifting?

CNN: THE OUTSTANDING PERFORMANCE

Brief exposure to high levels of PCBs and dioxins may cause skin lesions and affect the liver (the tolerated daily intake for dioxin is about 1 picogram - one trillionth of a gram - per kg body weight).

CNN: THE GREAT DIOXIN SCARE

Jackie also was struggling with her weight, at one point hitting 64 kg on a 157-cm frame.

CNN: For Better Or For Worse

The combined thrust from its two engines - at least 50, 000 lb (22, 680 kg) - is more than its weight with fuel and weapons - so it can accelerate even when going straight upwards.

BBC: News | In Depth | Military Fact Files

Surviving forces up to an earth shattering 1500 kg of static force is the proof that "THE CRASH" punches well above its weight.

ENGADGET: Philips showcases its 2013 Fidelio audio lineup at CES, we go eyes-on