No one likes a cheater, especially one that prospers as easily as the grass Bromus tectorum does in the American West. This invasive species is called cheatgrass because it dries…
Category: Plants
Rice feeds half the world. Climate change’s droughts and floods put it at risk
Under a midday summer sun in California’s Sacramento Valley, rice farmer Peter Rystrom walks across a dusty, barren plot of land, parched soil crunching beneath each step. In a typical…
Here’s the chemistry behind marijuana’s skunky scent
Scientists have finally sniffed out the molecules behind marijuana’s skunky aroma. The heady bouquet that wafts off of fresh weed is actually a cocktail of hundreds of fragrant compounds. The…
A well-known wildflower turns out to be a secret carnivore
Gleaming, gluey, deathtrap hairs have betrayed the secret identity of a well-known wildflower: It’s a carnivore. A species of false asphodel (Triantha occidentalis) uses enzyme-secreting hairs on its flowering stem…
Mammal brains may use the same circuits to control tongues and limbs
Precise control of the tongue is often vital in life, from the way frogs capture flies to human speech (SN: 1/31/17). But much remains unknown about how the brain controls…
Scientists remotely controlled the social behavior of mice with light
With the help of headsets and backpacks on mice, scientists are using light to switch nerve cells on and off in the rodents’ brains to probe the animals’ social behavior,…
How fossilization preserved a 310-million-year-old horseshoe crab’s brain
Paleontologists can spend years carefully splitting rocks in search of the perfect fossil. But with a 310-million-year-old horseshoe crab brain, nature did the work, breaking the fossil in just the…
A new book reveals stories of ancient life written in North America’s rocks
How the Mountains GrewJohn DvorakPegasus Books, $29.95 Imagine a world where pigeon-sized dragonflies soar above spiders with half-meter-long legs, where 2-meter-long millipedes slither and 20-kilogram scorpions hunt. About 300 million…
If confirmed, tubes in 890-million-year-old rock may be the oldest animal fossils
Pale, wormlike tubes in 890-million-year-old rock may be ancient sea sponges, a new study concludes. If confirmed, that controversial claim would push back the origin of the earliest sponges by…
3.42-billion-year-old fossil threads may be the oldest known archaea microbes
Threadlike filaments pressed in rock may be the remnants of archaea that burped methane near hydrothermal vents 3.42 billion years ago. If so, these strands in rock excavated in South…
