This question of why some branches of the tree of life explode into thousands of species, while others remain small, has shaped evolutionary biology since Charles Darwin. My colleague and I have ...

Several illegal and invasive cacti have been confiscated from a garden in an opal mining town. It's unclear how the prohibited plants came to be in the backyard garden. A variety of prickly plants ...

The cactus on your windowsill may grow slowly, but new research shows that cacti are surprisingly fast at creating new species. Biologists have long thought that pollinators and specialized flowers ...

What's the overall vibe of the garden – peaceful and quiet, or more like a busy tourist spot? It's quite peaceful if you go early in the day on weekends or on weekdays, which is my preference. It's ...

A variety of prickly plants have been destroyed after they were found in a backyard garden in a small opal mining town hundreds of kilometres from the nearest capital city. The cacti — including five ...

I heard the park is split in two – how do they compare, and which one should I choose if I only have one day? The West side (Tucson Mountain District) has denser saguaro forests, dirt scenic drives ...

It’s cacti harvesting time in Tucson and even though you may think you need to wrap yourself in a suit of armor, which could be handy against any snakes you may encounter, you can probably get by with ...

Saguaro National Park is famous for its namesake giant cactus, but many might be surprised to learn that the park is home to an amazing variety of other cacti — 25 species in all. In addition to ...

See the extreme ways in which raptors conquer the toughest habitats on Earth. Mes de Herencia Hispana con Cumbre Kids Únete a PBS Nature y Cumbre Kids durante el Mes de la Herencia Hispana.