Life Science

Mexican tetra (Astyanax mexicanus) are a fascinating example of divergent evolution. Over time, some of these freshwater river fish washed into caves where they continue to live. With perpetual darkness, these cavefish have lost their ability to see along with their skin pigmentation. Oxygen and food are also hard to come by in the caves.…

Wow. Every person on the planet saw one version or another of this “Octopolis” story and had to send it to me. It was the subject of a Friday Cephalopod a year ago, you know. Apparently, this is the second octopus city discovered, which is interesting — they’re exhibiting more complex social behaviors. However, I…

Through the course of evolution vertebrates have apparently lost their gene-encoded viral defense mechanisms. These ancient defenses allow plants and insects to silence the expression of certain genes by using what is known as RNA interference. This natural defense system can be manipulated to create genetically modified crops that resist certain infections. However, a new…

Friday Cephalopod: we all float down here

Pale, drifting quietly, long grasping arms, cold and anoxic…we all float down here. Yes, I’m going to go see It this evening. It won’t be half as creepy as the reality of the dark deep, though.

The Wildlife of Ecuador

Wildlife of Ecuador: A Photographic Field Guide to Birds, Mammals, Reptiles, and Amphibians by naturalist Andrés Vásquez Noboa, witih photography byablo Cervantes Daza, covers mainland Ecuador (but by “mainland” we also mean ocean mammals). Focusing only on non-piscine verts, you will need to go elsewhere for your inverts and plants and such. But you get…

The marsupial placenta

Image of a tammar wallaby and her joey By Mathae – Own work via Wikimedia Commons   When I think of marsupials, what comes to mind is an image of a mother carrying her young (joey) in a pouch. Contrary to popular belief, however, mother tammar wallabies (Macropus eugenii) have an internal functioning placenta. Albeit,…

Back to School Science and Culture Stuff

I usually write my annual back to school post earlier than this, but I was distracted by various events. There are three themes here. 1) You are a science teacher and I have some stuff for you. 2) You have a student in a school and you want to support the school’s science teacher. 3)…

Friday Cephalopod: Sinking blue

I think it’s a portrait of my mood right now.

Attempts to save Houston’s bats

By U.S. Fish and Wildlife Service Headquarters [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0) or Public domain], via Wikimedia Commons Got bugs? Get a bat. As many species of bats are insectivores, they help keep insect populations in check. Hurricane Harvey has been devastating to people, animals and property. So it probably comes as no surprise that there…