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Humans

Obese people can misjudge body size

Survey finds that many overweight individuals consider their body size normal and healthy despite having health problems

Life

Climate not really what doomed large North American mammals

Prevalence of a dung fungus over time suggests megafauna extinctions at end of last ice age started before vegetation changed.

Health & Medicine

Marathoners’ hearts stressed, but not necessarily by heart attacks

Detailed imaging of runners’ hearts before and after races doesn’t find signatures of heart attacks

Space

Sun may not be a ‘Goldilocks’ star

The stars that are just right to support life-bearing planets might be dimmer and longer-lived than the sun.