Here's a tiny space satellite that you can build and launch yourself

Most of the thousand or so operational satellites in orbit are multi-million-dollar machines that provide major industries with scientific research, global positioning or military espionage. Twenty-five-year-old Tom Walkinshaw, however, hopes to prove that satellites are not the preserve of leviathan space agencies, and that, for a comparatively small sum ($20,000), the workaday enthusiast can build and launch a fully functioning satellite of their own. One year old next January, his company PocketQube Shop provides the basic materials for doing this, most importantly the PocketQube structure itself - a tiny, 5cm³ casing made from aerospace-grade aluminium – which houses each satellite’s components.

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10 things you need to know about e-learning

Internet-based education offers everything from a free maths lecture to a full course on ancient Roman history. But it has its critics

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