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dr. dolittle | June 16, 2014 Infrared image of a koala (from S. Griffiths)
New research sheds light why koalas (Phascolarctos cinereus) spend so much time hugging trees. As shown in the infrared image above, the trees stay cool on hot days. Since koalas do not sweat, hugging trees is another method to keep their cool in addition to panting and licking their fur. The research also shows that the animals who hug trees lose less water through evaporation that those that do not hug trees.
I think I might need to start hugging trees this summer.
Source:
Briscoe NJ, Handasyde KA, Griffiths SR, Porter WP, Krockenberger A,…
esiegel | September 18, 2013"A cosmic mystery of immense proportions, once seemingly on the verge of solution, has deepened and left astronomers and astrophysicists more baffled than ever. The crux ... is that the vast majority of the mass of the universe seems to be missing." -William J. Broad
It was in the 1930s, looking at dense clusters of galaxies (like Coma, below), that Fritz Zwicky first noticed that the mass in the Universe didn't add up.
Image credit: Adam Block / Mount Lemmon SkyCenter / University of Arizona.
We knew how gravity worked, so it was pretty straightforward -- based on how the galaxies within…
grrlscientist | May 18, 2010tags: Richard Feynman Explains Rubber Bands, science, physics, imagination, hot, offbeat, rubber bands, jiggling atoms, physical laws, Richard Feynman, streaming video
Physicist Richard Feynman thinks more about the 'jiggling' of atoms, and about rubber bands and how they 'work'. "The world is a dynamic mess of jiggling things, if you look at it right", says Richard Feynman.
grrlscientist | May 17, 2010tags: Richard Feynman Explains Jiggling Atoms, science, physics, imagination, hot, offbeat, fire, jiggling atoms, physical laws, Richard Feynman, streaming video
Physicist Richard Feynman talks more about jiggling atoms and heat, and about what fire is.
From the BBC TV series 'Fun to Imagine' (1983).
grrlscientist | May 16, 2010tags: Richard Feynman Explains Jiggling Atoms, science, physics, imagination, hot, offbeat, cold, jiggling atoms, physical laws, Richard Feynman, streaming video
Physicist Richard Feynman thinks aloud about atoms and how they jiggle, and how we perceive that jiggling as 'hot' and 'cold'.
From the BBC TV series 'Fun to Imagine' (1983).