157
1052 days ago
Light of other days: today's sunlight is about 30,000 years old, made at the height of the last ice age
Writer. Books include Tweeting the Universe, We Need to Talk About Kelvin, Quantum Theory Cannot Hurt You & Solar System for iPad
157
1052 days ago
Light of other days: today's sunlight is about 30,000 years old, made at the height of the last ice age
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