Tree species diversity under pressure

In a new global study of more than 46,000 species of trees, an international team of researchers has shown that many tree species are under substantial pressure and poorly protected. The research team, headed by Aarhus University, ...

Google hopes to revolutionize video chat with 'Hangout' apps

Christine Egy Rose realized she was on to something powerful. Instead of the awkward monosyllabic two-minute exchange her two-year-old son Jackson typically had over a video chat link with relatives, he spent a full 50 minutes ...

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