Langkawi, a UNESCO-designated Global Geopark, is an especially popular destination for nature lovers. It’s where travelers ...

Resign.' 'Get on the Trump train!' We asked readers to share their thoughts on Donald Trump's return to the White House.

Lower bounds on the energy-constrained and unconstrained two-way quantum and secret-key capacities of all phase-insensitive bosonic Gaussian channels are provided. It proves that a non-zero ...