The International Atomic Energy Agency says North Korea is building a new uranium enrichment facility at Yongbyon and has begun operating an expanded annex at its Kangson site. The developments indicate Pyongyang is continuing to enlarge the infrastructure that supports its nuclear program, adding to concerns about the scale and durability of its weapons-related capabilities.

Indonesian rescuers are searching for a speedboat carrying journalists and crew that lost contact near Anak Krakatau in the Sunda Strait. The group was traveling to cover eruptions at the volcano, and authorities have not heard from those on board since Monday afternoon, raising fears as search efforts continue in the waters around the island.

Researchers at Queensland University of Technology find microplastics in Brisbane waterways and say the concern goes beyond how many particles are present. Their study also examines the materials’ potential toxicity, suggesting the pollution is widespread across local creeks and may pose broader environmental and health risks than simple counts of plastic fragments would show.

A new study explains how prehistoric builders likely moved the giant stones used for Yorkshire’s Devil’s Arrows, one of Britain’s most striking ancient monuments. The research indicates the roughly 25-tonne stones were transported from a distant source before being raised into what remains the tallest surviving prehistoric stone row in the country.