Plants & Animals

Distribution of females influences the evolution of testes size in Australian rodents

A new study has found the distribution of females in 33 species of Australian rodents affects the evolution of testes size of males in these social species.

Evolution

Squid and octopus genome studies reveal how cephalopods' unique traits evolved

Squid, octopus, and cuttlefish—even to scientists who study them—are wonderfully weird creatures. Known as the soft-bodied or coleoid cephalopods, they have the largest nervous system of any invertebrate, complex behaviors ...

Aging lymph nodes: Seeking a solution for weakened immune systems

It is well established that older adults are more susceptible to infection and their immune systems less capable of generating a strong immune response. Now, a new University of Arizona Health Sciences-led paper explains ...

Green roofs are worth the cost for urban residents

Plant-covered roofs have become a regular sight in Portland, Oregon. The city is a leader in incorporating green infrastructure for stormwater management, including free street trees, rebates for small residential housing ...

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Medical Xpress

Tech Xplore

Worst drought in decades devastates Ethiopia's nomads

There has hardly been a drop of rain in Hargududo in 18 months. Dried-up carcasses of goats, cows and donkeys litter the ground near the modest thatched huts in this small village in the Somali region of southeastern Ethiopia.

40 million more faced acute hunger in 2021: UN

The number of people facing hunger rose to 193 million last year as conflict, climate change and economic crises ravaged people's livelihoods, the UN's Food and Agriculture Organization said Wednesday.

Survey of LA homeless finds few want group shelter beds

A unique study conducting counts and surveys of unsheltered people in three parts of Los Angeles found that nearly half had been offered housing in the past, but they cited the housing intake process, desires for privacy ...

New dung beetle species on Australian soil

The Dung Beetle Ecosystem Engineer (DBEE) project reached a major milestone last month—the arrival of a new dung beetle species, Gymnopleurus sturmi, on Australian shores. It is the third and final dung beetle species imported ...