In the field of wireless communication, security is of utmost importance. A new study published in Engineering explores intelligent covert communication. It reviews current techniques across different domains, from time and frequency to spatial and modulation. The research also looks at future trends like intelligent cooperative and parasitic covert communication, as well as challenges such as dealing with active detection and integrating sensing and communication. This offers valuable insights for the development of more secure wireless communication methods.

A recent review has shed light on the transformative potential of acoustic technologies in the fields of biofabrication and tissue engineering.

Quaise Energy reports new insights into designing superhot geothermal plants in two recent papers. The geothermal plants of today work at relatively low temperatures, most ranging from about 100 to 250^oC. Less is known about designing plants for tapping into the heat in superhot rock over 375^oC, which could offer significant benefits. Daniel Dichter of Quaise is working to understand more, and presented his most recent results at two recent conferences.

Scientists have discovered that whales move nutrients thousands of miles—in their urine—from as far as Alaska to Hawaii. These tons of nitrogen support the health of tropical ecosystems and fish, where nitrogen can be limited. They call this movement of nutrients a “conveyor belt” or “the great whale pee funnel.” In some places, like Hawaii, the input of nutrients from whales is bigger than from local sources. It’s critical to tropical ocean health, therefore, to protect and restore whales.