Some define the Arctic as being the 50-degree isotherm, where the average summer temperature is roughly where the tree line is. What is this area called?
Question 2 of 10
What monster was supposedly photographed by London gynecologist Robert Wilson in 1934?
Question 3 of 10
Back in the 1970s, which of these items might have been quadraphonic?
Question 4 of 10
When enzymes break down stray red blood cells, they leave dark circles behind in a part of your face with the thinnest skin. Where?
Question 5 of 10
Elias Howe successfully sued Isaac Singer for violating his patent on what invention?
Question 6 of 10
I'm credited with inventing the cat flap, whose pendulum effect also illustrates my third law of motion. Who am I?
Question 7 of 10
What would you use a lathe for?
Question 8 of 10
Who would use an altimeter? And why?
Question 9 of 10
The US Army developed N, N- diethyl-m-toluamide in 1946. Today, it is sold as DEET. What do we use it for?
Question 10 of 10
Despite its effectiveness in controlling malarial mosquitoes, what controversial chemical vanished from use after Rachel Carson blamed it for killing birds and poisoning people in her 1962 book Silent Spring?