Katarina Zimmer

All Stories by Katarina Zimmer

  1. Psychology

    Some irritability is normal. Here’s when it’s not

    Irritability is a normal response to frustrations, but it can sometimes signal an underlying mental health disorder, like depression or anxiety.

  2. Animals

    Just like humans, many animals get more aggressive in the heat

    From salamanders to monkeys, many species get more violent at warmer temperatures — a trend that may shape their social structures as the world warms.

  3. Plants

    Trees ‘remember’ times of water abundance and scarcity

    Spruce trees that experienced long-term droughts were more resistant to future ones, while pines acclimatized to wet periods were more vulnerable.