Tiny particles from certain lab gloves look like microplastics, and they can contaminate samples, new study finds.

Iran's Revolutionary Guards have warned that ships passing through the narrow Strait will be targeted, after the US and Israel launched strikes on the country on February 28. The Iran war has threatened Gulf ports and disrupted global trade through the Strait of Hormuz, a vital waterway through which roughly a fifth of the world's oil and liquefied natural gas normally passes.

South Korea lofted the CAS500-3 Earth-observation satellite and a dozen ride-along cubesats Wednesday (Nov. 26) on the fourth-ever launch of its Nuri rocket.