Gall mites are too small to see without aid, but scientists found two of them after scanning 70,000 amber droplets from Triassic beds in Italy. How much have mites evolved in the supposed 230 million years since they were entombed in amber?

Data storage technology has come a long way since punch cards. But the undisputed king of data density is still DNA. A team of scientists fit 70 billion copies of their genetics book—including page formatting instructions and images totaling 700 terabytes of data—into just one gram of DNA.