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Quantum and Classical Realities: Reconciled at Last?

Some physicists think they've explained how quantum effects vanish at macro scales; others say it doesn't change quantum mechanical paradoxes.

Evidence-Based Cosmology

From what we observe, we can draw inferences without the need to posit occult phenomena.

More Cosmic Fine-Tuning Found

The Anthropic Principle refuses to go away. The mass of the light quark adds to finely tuned factors that make the universe life-supporting.

Big Bang's Lithium Problem Gets More Problematic

There's no escape; new measurements show far less lithium than predicted by the big bang, and more fine tuning than would be expected by chance.

Archive Classic: State of the Cosmos 2005: Alan Guth Explains Inflation

As Alan Guth rises to prominence this year for his inflation proposal, it might be useful for readers to see what he said about it in 2005.
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