Items by J. MADELEINE NASH

Eucalyptus: Beauty or Beast?
Eucalyptus: Beauty or Beast?
Restoration pits these exotics against California natives. But for some, they’re a natural.
A forester searches for a kinder, gentler eucalyptus
A native butterfly finds merit in a nonnative tree
Computer model slices and dices mountain climates
Computer model slices and dices mountain climates
In Oregon's H.J. Andrews Experimental Forest, scientists study climate patterns.
Dancing with Climate Change
Dancing with Climate Change
In California's White Mountains, scientists ponder the fate of beardtongues, bristlecone pines and butterflies in a rapidly warming world.
Silenced Springs?
Silenced Springs?
Rare and tiny spring-dwelling creatures are threatened by everything from invasive species to Las Vegas' plan to pump groundwater from a rural part of Nevada.
Bring in the cows
Bring in the cows
Ecological consultant Stuart Weiss believes that carefully managed grazing could help save a rare California butterfly from extinction.
Acidifying oceans
Paleo-oceanographer James Zachos points to evidence of the last time climate change acidified the oceans, some 55 million years ago.
Back to the future
A long time ago, the earth warmed considerably; now, scientists study fossils to find out what happened – and what it might mean for us today.