Aerospike rocket engines are the stuff of legend in the space industry. Conceived in the 1960s, their unique spiked-nozzle design promises better efficiency, reusability, and performance at all altitudes. But their complexity — and the shutdown of major space programmes towards the end of the 20th century — meant they never entered the mainstream. But now, startups are dusting off old design [...]
Lenacapavir, a twice yearly injection that prevents HIV transmission, was named the breakthrough medicine of 2024. But without US foreign aid dollars, its delivery to millions worldwide is under threat. [...]