Why doesn’t the sun go to college?

Until now, NASA's Helios 2 was the vessel that has got the closest to the sun: in 1976, it came within 27 million miles of the surface of the sun.

This is about to change, as NASA is planning on making its brand new Parker Solar Probe have a path that will take it 3.83 million miles away f...

Most foods spoil because of the growth of microbes. Preserving food is an attempt to limit microbial growth. Food can be preserved by drying, salting, chilling, or storing in air-tight containers.

• Drying is the most effective because microbial growth is inhibited.
• Salting is...

• Acidity. Most bacteria prefer neutral growing conditions. The enzymes bees use to break down the sugar in nectar make it more acidic and less appealing for bacterial growth.
• Sugar content. Honey has a lot of sugar, but only 18% water, which is not ...