Germany rolls out world's first hydrogen train

Germany on Monday rolled out the world's first hydrogen-powered train, signalling the start of a push to challenge the might of polluting diesel trains with costlier but more eco-friendly technology.

Applying mathematics takes 'friendship paradox' beyond averages

The friendship paradox is the observation that the degrees of the neighbors of a node within any network will, on average, be greater than the degree of the node itself. In other words: your friends probably have more friends ...

Can solar energy save the bees?

In response to the population decline of pollinating insects, such as wild bees and monarch butterflies, researchers at the U.S. Department of Energy's (DOE) Argonne National Laboratory are investigating ways to use "pollinator-friendly ...

Facebook graph reveals who you love

(Phys.org) —Even if you're not shouting it from the housetops, there's a good chance the structure of your Facebook neighborhood will identify your romantic partner.

Genome-wide analysis reveals genetic similarities among friends

If you consider your friends family, you may be on to something. A study from the University of California, San Diego, and Yale University finds that friends who are not biologically related still resemble each other genetically.

Review: Scrutinizing your presence on Facebook

(AP) -- Here's one way to sum up 2011: I added 71 people as Facebook friends, shared 26 links and commented on 98 of my friends' status updates. I was tagged in 33 photos and added 18 of my own to the site.

Your friends have more friends than you do

No matter how smart and funny you think you are, those you follow on Twitter really do have a larger following than you. And the same holds true for Facebook. But there is no reason to feel badly about any of this, according ...

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