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A new report for the Pentagon has concluded that the nation’s military is unprepared for a full-scale cyber-conflict with a top-tier adversary and must ramp up its offensive prowess. The unclassified version of the study by the Defense Science Board also urges the intelligence community to boost its collection on leading nations’ cyber-capabilities.

The researchers didn't find the same IQ dip for people who became frequent users of pot after 18. Although experts said the new findings are not definitive, they do fit in with earlier signs that the drug is especially harmful to the developing brain.

It has been known that pigeons can count, but a recent experiment showed they can perform a higher math task that had been demonstrated only in primates: ranking groups of items from fewest to most.

Brain games can help with abstract reasoning months after the training, but they work only for those who really need and enjoy the exercises, a study says. Training a child to hold a whole cluster of items in his or her memory for even a short time may feel like trying to hold a wave on the sand.