Score: 4.1/5 (17 votes) Precordial catch syndrome is a common cause of chest pain in older children and young adults. Precordial means 'in front of ...

Score: 4.5/5 (17 votes) Obsidian can be found all over the world in areas with volcanic activity. For example, significant deposits of obsidian can be fo...

Score: 4.6/5 (6 votes) Our principal operations are in Asia, Canada and the United States where we have served customers for more than 155 years. We trad...

Score: 4.2/5 (52 votes) A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength ...

Score: 4.5/5 (22 votes) Wolfsbane, also known as aconite or monkshood, is a potent herb and a werewolf's most well-known weakness. If a werewolf mak...

Score: 4.7/5 (68 votes) A properly maintained hot compost pile will kill weed seeds, as well as many other pathogens, so you can compost weeds without ha...

Score: 4.1/5 (17 votes) Pleochroism in Cordierite (Iolite) Specimens that produce a strong violet color can be rotated to produce light violet or dark ye...

Score: 4.9/5 (5 votes) Puddle ducks, also known as dabbler ducks, are ducks that feed primarily in shallow water and that do not dive beneath the water&#...

Score: 4.2/5 (15 votes) Purring (and many other low-frequency vocalizations in mammals) often are associated with positive social situations: nursing, gr...

Score: 4.1/5 (21 votes) Because microbes used as probiotics already exist naturally in your body, probiotic foods and supplements are generally considere...