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They are becoming heavier to better reflect the weight of the population. Tech Know's Phil Torres & Shini Somara report.
TechKnow's resident entomologist observes the curious, coordinated movement of the barklice
Scott Kelly and Mikhail Kornienko blast off on marathon mission, the longest-ever for an American astronaut
Hadfield, the first Canadian to walk in space, discusses spending months at the International Space Station
Critics say a handful of government agencies hobble gold-standard research with red tape and intimidation
The Guitar Building Institute aims to help high school students better grasp science, technology, engineering and math
A partial eclipse draws viewers from Egypt to the Arctic
Young innovator Shiva Nathan discusses why STEM matters for his generation and why towns need to invest in 'makerspaces'
No damage reported so far as two blasts of magnetic plasma from the sun arrived earlier and much stronger than expected
TechKnow's Lindsay Moran meets an elite team of scientists studying some of the world's deadliest viruses.
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Beyond the beehive: The deeper message of the B-52s' music
Where do New York's homeless families go to find shelter?
Ellen Pao loses her gender discrimination case
First person: Canadian astronaut Chris Hadfield
Indiana signs a controversial 'religious freedom' bill into law