Physics
Inflation deflated? The big bang’s toughest test
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Satellite imagery reveals that Papua New Guinea's rainforests – renowned for their amazing biodiversity – are being logged faster than thought
China is trying to move away from coal-fired energy, but building hydroelectric dams in earthquake zones is not the best way to go
Our best theory of the early universe is starting to look a tad insecure. Could this mean we've got it all wrong, asks Michael Brooks
Biomedical researchers who test on animals have long been targeted by animal-rights activists. Now they have decided it's time to fight back