Two researchers have improved a well-known technique for lattice basis reduction, opening up new avenues for practical experiments in cryptography and mathematics.

Grover's algorithm, a quantum algorithm for search, can be used to prepare entangled states of many qubits efficiently.

After putting the finishing touches on their shortest-paths algorithm, they showed that it could also work as a fast algorithm for pinpointing negative cycles. Virtually no graph was beyond its reach.

Platforms like Facebook and Instagram are under mounting pressure to reform the ways in which they're built to be addictive for users.