
Do octopus live in the Bay? Marine biologist Andrew Cohen’s answer may surprise you.

Monarch butterflies are often found in huge clusters on eucalyptus trees. Why do they seemingly prefer these non-natives?

A reader found a huge spider. Is it a tarantula?

An Ask the Naturalist reader finds some egg-looking things on Juncus leaves. What are they?

Could trees help Silicon Valley find an identity?

What kind of mushroom is this?