Tomatoes contain two pigments for photosynthesis—chlorophyll, which is green, and lycopene, which is red. When tomatoes start to grow, they contain much less lycopene than chlorophyll, which gives them their green color. But when harvest season arrives, the days shorten and temperatures drop, causing chlorophyll to dissolve and lycopene to take over the shade of the fruit. During this time, sugar levels rise, acid levels drop, and the tomato softens. It becomes ready to... READ ON
There’s a reason it’s called Death Valley. This vast expanse of the Mojave Desert gets less than 2 inches of rain per year, the daytime temperatures can reach upwards of 120 degrees, and the landscape is so salt-laden and windswept that it’s nearly impossible for anything to take root. But there’s more life in Death Valley than you’d imagine. Here are 10 stubborn plants and animals that refuse to retire to greener pastures.
1. The Rat with a Drinking Problem
Like many Death Valley... READ ON
Google's founders were ready to sell to Excite for under $1 million in 1999. Excite turned them down.