Here's everything you need to know about sumac, the tangy spice that's a key ingredient in many Middle Eastern dishes and has various other applications.

Researchers have identified traces of plant toxins on Stone Age arrowheads – making it the oldest known arrow poison in the world to date. A team analysing 60,000–year–old quartz arrowheads from ...

The world’s oldest poisoned arrows – dating back 60,000 years – have been identified. The discovery reveals early advanced ...

Poison ivy tends to hide in plain sight. It grows in wooded areas, climbing its way up the sides of trees. It hides in the weeds on the ground. It spreads quickly, taking over fences and flower beds.

Traces of plant poison on ancient African arrowheads provide the oldest direct evidence of poisoned weapons. Scientists have ...

"This is probably the largest outbreak in California history," an official said.