the conversation
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Sea Sponges or Algae? What Are The Earth’s Earliest Animals?
Sponges are the simplest of animals, and they may stand at the root of all complex animal life on Earth, including us humans. Scientists study the evolution of the earliest sponges, hundreds of millions of years ago, to learn about the conditions that led life to develop from single-celled amoeba-like creatures to the large, mobile…
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Greenland is Melting – Why We Need To Worry About The World’s Largest Island
Greenland is the largest island in the world and on it rests the largest ice mass in the Northern Hemisphere. If all that ice melted, the sea would rise by more than 7 metres. But that’s not going to happen is it? Well not any time soon, but understanding how much of the ice sheet…
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Curved Origami Offers A Creative Route To Making Robots And Other Mechanical Devices
The big idea Building robotic grippers that can firmly grasp heavy objects and also gently grasp delicate ones usually requires complicated sets of gears, hinges and motors. But it turns out that it’s also possible to make grippers out of simple sheets of flexible material with the right creases in them. Our lab at Arizona…
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What Would Happen If We Cut Down The Amazon Rainforest?
What would happen if we cut down the entire Amazon rainforest? Could it be replaced by an equal amount of reforestation elsewhere? Removing the entire Amazon rainforest would have myriad consequences, with the most obvious ones possibly not the worst. Most people will first think of the carbon currently stored in the Amazon, the world’s…