Over their short lifetimes many migratory birds fly a distance equivalent to that between earth and the moon. Some people call them courageous. Hope is a thing with feathers.
Grains of Sand
Graphene with ripples could help make better hydrogen fuel cells
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The one-atom-thick layer of carbon known as graphene can split hydrogen 100
times more efficiently than an equivalent mass of the best catalysts
because of...
4 hours ago
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