If our solar system fit into a cup, our galaxy would be the size of this 3rd largest continent
Not just "Ludwig von" but any male duck
The only animal that has walked on the moon
Partly frozen rain or rain mixed with snow
An unlimited extent of space, time or quantity, as in numbers that go on "forever"
Trade name for plastic used as protective layer on "non-stick" kitchen utensils
A short story by Franz Kafka, or the life story of a butterfly
1st called this in 19th c., branch of biology dealing with inter-relationship of organism & environment
In genetics, it's what passing of characteristics from Mom & Dad to Junior is called
Why a straw standing in a glass of water looks like it's broken at the water's surface