No one tells you what those different beeps or on-off lights on your smoke detector mean. Here's what you need to know.

All firecrackers use a similar formula — a mix of fuel, oxidisers, and binders to create light, sound, and colour. What sets green crackers apart is their altered chemical makeup.

The Secret of the Popping Sound We’ve all done it, sitting idle, stressed, or just bored, we twist our fingers till they pop!