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Do-It-Yourself DNA: Scientists assemble first synthetic genome
Assembly of the first human-made microbial genome could pave the way for making microbes with synthetic DNA.
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EcosystemsBig Foot: Eco-footprints of rich dwarf poor nations’ debt
The first global accounting finds rich and middle-income nations stomping heavy footprints on poorer ones.
By Susan Milius -
MathBenjamin Franklin Plays Sudoku
Founding father entertained himself devising beautiful mathematical puzzles.
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AstronomyFour’s a crowd
Astronomers have found a quartet of stars packed into a region smaller than Jupiter's orbit around the sun.
By Ron Cowen -
AstronomyGravity at play: A double lens
Astronomers have discovered an extraordinarily rare double cosmic mirage.