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When cattle arrive at a slaughterhouse on a Friday but are held for processing until Monday, they have an increased incidence of producing tough, low-grade meat, new research shows.

“It can happen if there are too many cattle and there’s a backup, or if there’s a plant breakdown,” said Heather Bruce, an associate professor of carcass and meat science in the Faculty of Agricultural, Life & Environmental Sciences.

Scientists at the University of York have used sea water collected from Whitby in North Yorkshire, and scrap metal to develop a technology that could help capture more than 850 million tonnes of unwanted carbon dioxide in the atmosphere.

What are crows saying when their loud cawing fills a dark winter’s evening? Despite the inescapable ruckus, nobody knows for sure. Birds congregate daily before and after sleep, and they make some noise, but what might be happening in those brains is a mystery.

Curious about these raucous exchanges, researchers at the University of Washington Bothell are listening in. They are placing equipment on the roof of their building — a meeting place for some of the thousands of crows that sleep in nearby campus trees — and using a sort of computerized eavesdropping to study the relationship between calls and the birds’ behavior.

Monkeys who catch Zika virus through bites from infected mosquitoes develop infections that look like human Zika cases, and may help researchers understand the many ways Zika can be transmitted.

How long might a rocky, Mars-like planet be habitable if it were orbiting a red dwarf star? It’s a complex question but one that NASA’s Mars Atmosphere and Volatile Evolution mission can help answer.