Categories
Miscellaneous Graphics

A Rough Guide to Types of Scientific Evidence

Today’s graphic looks at science in general, rather than just chemistry. It’s in a similar vein to the Rough Guide to Spotting Bad Science posted last year, but this time looking at the hierarchy of different types of scientific evidence. You might think science is science, but some evidence is ranked higher in the scientific community than […]

Categories
Miscellaneous Graphics

The Shapes of Snowflakes

In the Northern Hemisphere at least, the idealised vision of Christmas involves snow. Whilst no one snowflake is exactly the same as another, at least on a molecular level, scientists have none-the-less devised a system of classification for the many types of crystals that snow can form. This graphic shows the shapes and names of […]

Categories
Miscellaneous Graphics

How Can Xylitol Gum Help Prevent Tooth Decay?

Tooth decay, also commonly referred to as dental caries, is the result of acidic conditions in the mouth, due to bacterial activity. These conditions lead to the outer layers of the teeth slowly being dissolved, which can eventually lead to holes in the teeth (cavities) in serious cases. To combat this, xylitol gum has been suggested as […]

Categories
Miscellaneous Graphics

Shark Week Special: A Brief History of Chemical Shark Repellents

The human fear of sharks is an age old one. Even though your odds of being killed by a shark are estimated to be approximately 1 in 3.7 million, versus a 1 in 218 chance of simply dying from a fall, the fear persists, and over the years many chemists have turned their attentions to […]

Categories
Miscellaneous Graphics

Lethal Doses of Water, Caffeine and Alcohol

Today’s graphic is a whimsical look at lethal doses of chemicals we consume on a regular basis. Whilst it may be more common to view chemicals in a black and white framing of ‘toxic’ or ‘non-toxic’, the reality is more of a sliding scale of toxicity. The admission of too much of any chemical into the body […]

Categories
Miscellaneous Graphics

The Chemistry of Gunpowder

With the Fourth of July and American Independence Day on the horizon, a somehow topical post seemed in order. Having already examined the chemical compounds that give fireworks their colours in a previous graphic, I decided to examine another important firework component here: the first chemical explosive, gunpowder, also commonly referred to as black powder.