Do the recycle numbers assigned to plastic containers indicate if they are
safe to use for heating food in a microwave oven?
Readers' Question
Readers contributed to December's walking geese
question. Here's your next question:
Can a domestic cat be trained as well as a dog? Because, I've tried to train mine
with not much success... Vicky, Maracaibo,
Venezuela
Deadline: 22 Feb. We will publish the best
answers on 8 March.
You get the credit. Click here to give April your answer: Answer the question.
Curious sunrises-- figures
Ice crystals cause pillars as they drift down like flower petals. The
crystals (blue lines in the drawing) must be aligned almost
horizontally--tipped slightly down. Sunlight grazes the crystal bottoms
and bounces down to the eye. Light seems to come from a vertical shaft
instead of the actual stack of reflections.
Imagine a sun pillar drawn through the stack of ice crystals and you have
the whole picture.
Credits: Photo-- Lanney Atchley, Drawing--
April Holladay
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Credits: Photo-- Lanney Atchley, Drawing--
April Holladay