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Observations

Observations

Opinion, arguments & analyses from guest experts and from the editors of Scientific American

Where (Some of) Earth's Gold Came From

Of all of that precious metal ever refined, 600 tons were created in a collision between two neutron stars 1,000 light-years away and 4.6 billion years ago

May 23, 2019 — Imre Bartos and Szabolcs Márka

The Polycystic Sisterhood

Infertility is on the rise, but one major cause—polycystic ovarian syndrome—gets too little attention

May 21, 2019 — Abigail Meola

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Memorial Day Flash Sale

Memorial Day Flash Sale

How Smartphones Affect Mental Health