News
- Earth
Protective Blanket: Atmosphere blocks many small stony asteroids
A new computer model that more realistically simulates the aerodynamic forces on an object as it passes through Earth’s atmosphere suggests that the thin layer of air is an even better shield than previously thought.
- Health & Medicine
Split Ends: Cancers follow shrinkage of chromosomes’ tips
Genetic tabs called telomeres, which normally protect the ends of chromosomes, become undersized in many tissues that later turn cancerous, new studies in people show.
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Where’s Poppa? Absent dads linked to early sex by daughters
Long-term studies conducted in the United States and New Zealand indicate that girls are particularly likely to engage in sexual activity before age 16 and to get pregnant as teenagers if they grew up in families without a father present.
