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Nancy Atkinson writes 'Why is the James Webb Space Telescope (scheduled to launch in 2013) taking so long to build? Hasn't it had a huge cost over-run and several delays? Nobel Prize winner John Mather is the Project Scientist for JWST, and he addresses these questions and more in an in-depth interview, one of the few he's given about this next-generation telescope and successor to the Hubble Space Telescope. Quoting: 'The hardest thing to build was the mirror, because we needed something that is way bigger than Hubble. But you can't possibly lift something that big or fit it into a rocket, so you need something that is lighter weight but nonetheless larger, so it has to have the ability to fold up. The mirror is made of light-weight beryllium, and has 18 hexagonal segments. The telescope folds up like a butterfly in its chrysalis and will have to completely undo it self. It's a rather elaborate process that will take many hours. The telescope is huge, at 6.5 meters (21 feet), so it's

The Treasury's plan for a public-private partnership to buy banks'toxic assets may still be weeks away.

The opening of the long-delayed Xanadu retail and entertainment complex in new jersey's Meadowlands has been pushed back again due to a default on a construction loan, a project spokesman said Friday. 'We are contemplating a new opening date beyond August...

Delaying classes for teens until later in the day helps them learn better, experts say.

Controversial new rules changes to F1 which would have seen the world title decided by race wins have been shelved until 2010. Motorsport's world governing body FIA back down late on Friday in the face of opposition from defending champion Lewis Hamilton (above) and teams.

At first, Natasha Richardson said she felt fine after she took a spill on a Canadian ski slope. But that's not unusual for people who suffer traumatic head injuries like the one that killed the actress.