A robotic submarine scanning for signs of missing Malaysia Airlines flight MH370 is two-thirds through its ocean scan but has yet to find any trace.
Boston is set to hold an emotional annual marathon amid high security, a year after bombs near the finish killed three and injured hundreds.
Dramatic scenes unfold as hungry emperor penguins face a leopard seal on the prowl in Antarctic waters. David Attenborough narrates.
Are you a globe trotter or do you just dream of exploring our planet? Test your knowledge with a game that lets you discover the world.
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