Why these Mexican fish do the wave. [link]

Wasps in your yard. Getting to know them. [link]

Can single cells learn? [link]
 

Hydra with a bud Peter Schuchert, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons

Sleep evolved before the brain. Ask the Hydra. [link]

How the swine flu epidemic of 2009 developed. [link]
 

Do birds have a sense of smell? Turkey Vultures can smell carrion, but what about other kinds of birds? [link]

Ted LaMontagne thought this WAPO article was worth reading. [link]

Monarch butterflies may have another trick up their sleeves to avoid being preyed upon. [link]