It's the acid man!Left-handed acids...
From space.
Amino acids are the building blocks that make up proteins. In nature, all amino acids exist as one of two possible mirror-image forms, kind of like our hands. However, the ones life uses are all left-handed.
Dr. Daniel Glavin, an astrobiologist with NASA's Goddard Space Flight Center in Maryland, asked why and found meteorites suggest early Earth was bombarded with asteroids which may have tipped the balance towards life choosing to lean left rather than right.
Dr. Daniel Glavin, an astrobiologist with NASA's Goddard Space Flight Center in Maryland, asked why and found meteorites suggest early Earth was bombarded with asteroids which may have tipped the balance towards life choosing to lean left rather than right.
Audio: CBC Radio's Quirks & Quarks, March 21st. Host: Bob McDonald.
News release: (Goddard Space Flight Center.
Dr. Glavin's web page.
Illustration: Chiral molecules - NASA/Mary Pat Hrybyk-Keith.
News release: (Goddard Space Flight Center.
Dr. Glavin's web page.
Illustration: Chiral molecules - NASA/Mary Pat Hrybyk-Keith.
Earthquake, tsunami,
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