Glowing green waters surrounded a boat in the Arabian Sea. Illustration by Mercedes Minck The sky was moonless and overcast, leaving no stars to steer by. Alone at the helm in the middle of the ...
When exposed to UV light, the sediment in this piece of volcanic rock phosphoresces, glowing green for several seconds. This brief “glow in the dark” effect reveals the sediment is made out of calcite ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results