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Jose Gomez-Ibanez on greater urban density and less driving
Jose Gomez-Ibanez studied the amount by which people living closer together - and driving less - can reduce the CO2 emissions to help global climate change.
September 28, 2009
Kathy Jacobs warns climate extremes will change water access
Kathy Jacobs told EarthSky that we'll all have to adapt to climate extremes by using water more sustainably. But sustainable water use will mean different things in different places.
September 28, 2009
Hania Zlotnik sees economic challenges for aging population
Hania Zlotnik, director of the UN population division, talks about the economic challenges for a future with an aging population, and an encouraging sign.
September 28, 2009
September 25 is Earth Overshoot Day for 2009
Today is the day on which we begin consuming more resources than Earth is producing - and producing more waste than Earth can absorb - for 2009.
September 25, 2009
Scientists can see Mars in 3-D from lander photos
New computer system generates 3-D views of Mars from the Mars Exploration Rovers Spirit and Opportunity photos, enabling virtual tours for scientists.
September 24, 2009
Do some animals grow throughout their lives?
Many animals can get as big as their environment and diet allow.
September 23, 2009
What gives flames their tongue-like shapes?
Flames get their "tongue-like" shapes from the way burning gases move and interact under earthly gravity.
September 23, 2009
What makes hair curly?
Certain kinds of chemical bonds may change the shape of individual hair molecules, folding them back for an overall curly effect.
September 23, 2009
How sensitive is are ants sense of smell?
The kind of ants you see in your kitchen probably have a few thousand of these "smell cells," and the cells are tuned to different classes of odors.
September 23, 2009
Is my car’s fuel made of dead dinosaurs?
Fossil fuels consist mainly of dead plants - coal from trees, and natural gas and oil from algae, a kind of water plant, not dead dinosaurs.
September 23, 2009
