Monthly Archives: May 2014


Robot Crocodile and Hippos
Remote sensing is a common method to gather data in areas too dangerous for humans. Scientists at Carnegie Mellon University wanted to measure water quality in hippo pools in Kenya’s Mara River. During times of low flow rates, fish die downriver due to low oxygen levels in the water. The […]

Robot Crocodiles Monitor Hippo Dung


PHA Producing Bacteria
Researchers from Stanford University are making biodegradable plastic from waste methane. PHA or PolyHydroxyAlkanoate is a group of biodegradable polymers produced by bacteria. These bacteria convert carbon from sugar via fermentation into PHA. The bacteria are harvested, dried and the pellets of PHA removed to be molded into plastic. One problem with this process is the use […]

Biodegradable Plastic From Waste Methane


Bromine Element Cell 2
It’s important to know how to use a periodic table. The periodic table organizes the elements in a way that allows you to predict element properties and chemical reactions, even if you don’t know anything about an element except what you see on the table. Here’s a look at the […]

How To Use a Periodic Table



Kepler spacecraft
The Kepler Space Telescope was the spacecraft launched by NASA to discover exoplanets back in 2009. Its purpose was to monitor a particular region in space and collect data on the brightness of stars. It would send the data back to Earth for analysis. Astronomers would look for variations in a […]

Kepler Space Telescope To Come Out Of Retirement


Global Selfie Mosiac
On Earth Day, NASA asked people to take a ‘selfie’ photograph showing “Where are you on Earth right now?”. This event, dubbed GlobalSelfie, asked everyone to share their pictures to a variety of social websites. Selfies began to appear from 113 different countries ranging from Antarctica to Greenland. By the end of […]

NASA’s GlobalSelfie Mosaic


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This is a table of the valences or oxidation states of the elements. The most common valences are in BOLD. Values in italics are predicted theoretical values. This information is available on a Color Periodic Table of the Elements or a Black and White version. A simpler version listing only the […]

Table of Valences of the Elements