Browsing Posts of 'Liza Lester'
Overabundance of an essential nutrient is not always a good thing. – by Liza Lester, ESA communications officer. A tractor spreads manure. Excess fertilizer seeping out of fields has a host of consequences for ecological systems and human health. Credit, flickr user eutrophication&hypoxia, 2010. NITROGEN is both an essential nutrient and a pollutant, a [...]
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This post contributed by Liza Lester, ESA communications officer. Four years ago, graduate student Austin Gallagher took a video camera into the tropical waters around Mo’orea, about 17 km northwest of Tahiti in French Polynesia. With his first post to YouTube, he was hooked. Filmmaking supplied an instant gratification quotient to balance the years of [...]
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This post contributed by Liza Lester, ESA communications officer Astronaut Bruce McCandless II drifts free, 350 kilometers above Earth’s surface and 100 meters from the safe haven of the Space Shuttle Challenger, during one of NASA’s first un-tethered spacewalks (credit, STS-41B, NASA 1984, via the Astronomy Picture of the Day). Invisible bonds of absolute necessity [...]
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This post contributed by Liza Lester, ESA communications officer In November, Norwegians Arnoldus Schytte Blix, Lars Walløe and Lars Folkow brought us the news that running reindeer cool themselves through open-mouthed panting, as Sara Reardon explains at ScienceNOW. Their heavy winter coats are so effective at insulating the animals from arctic temperatures that they have [...]
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This post contributed by Liza Lester, ESA communications officer Jesse Nippert spoke with me in today’s edition of ESA’s Field Talk podcast. Listen. The little trees were insignificant against the grass. It seemed as if the grass were about to run over them, and over the plum patch behind the sod chicken house. As I [...]
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