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What if a killer asteroid were headed toward Earth? NASA plans to find out this week – NBC News

April 29, 2019, 4:00 PM UTC Think of it as a crash course in averting asteroid crashes. As part of the 2019 Planetary Defense Conference, NASA, the Federal Emergency Management Agency and their international partners will conduct a so-called tabletop exerci…

What if a killer asteroid were headed toward Earth? NASA plans to find out this week – NBC News

April 29, 2019, 4:00 PM UTC
Think of it as a crash course in averting asteroid crashes.
As part of the 2019 Planetary Defense Conference, NASA, the Federal Emergency Management Agency and their international partners will conduct a so-called tabletop exerci…
Read More

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Visible light and nanoparticle catalysts produce desirable bioactive molecules – Phys.org

Visible light and nanoparticle catalysts produce desirable bioactive molecules – Phys.org

Molecules adsorb on the surface of semiconductor nanoparticles in very specific geometries. The nanoparticles use energy from incident light to activate the molecules and fuse them together to form larger molecules in configurations useful for biological applications. Credit: Yishu Jiang, Northwestern University Northwestern University chemists have used visible light and extremely tiny nanoparticles to quickly…