Random
This Swede's original scale had water's boiling point at 0 degrees & its freezing point at 100
Celsius
Bhutan is nestled between these 2 big neighbors
China & India
If you're a fast learner, you're said to be "quick on the" this
Uptake
This word for an afternoon nap derives from Latin for "sixth" because workers often rested about 6 hours after dawn
Siesta
Cement plus water plus sand &/or gravel equals this hard stuff used in construction
Concrete
She became queen in 51 B.C. when her father the pharaoh died
Cleopatra
Go north from Costa Rica & you're in Nicaragua; head southeast & you're in this country
Panama
In a challenging situation, you might find yourself here "without a paddle"
Up a creek
By coincidence, this literary character known for napping had the same last name as Washington Irving's publisher
Thanks to its tetrahedral atomic structure, this pure-carbon mineral is the hardest known substance in nature
A diamond
Surely this rings a bell: the name of this physiologist who studied the secretory activity of digestion from 1890 to 1900
Ivan Pavlov
Lebanon borders just Israel & this country
Syria
A difficult struggle is this type of "battle"
Uphill
True Parrot Heads know the title of his final album, "Equal Strain on All Parts", was his grandfather's way of referring to a nap
Jimmy Buffett
Per the 1666 Rebuilding of London Act, "against future perills of fire", all future buildings were to be made of stone &/or this
Brick
Until 1935 Iran was known by this name
Persia
It has a 21-mile border with Austria & a 25-mile border with Switzerland
Liechtenstein
It's one of the 4 basic boxing punches
Uppercut
This president's nap divided a "two-shift day"; he suffered a fatal heart attack in 1973 after lying down one afternoon at his Texas ranch
Lyndon Baines Johnson
So strong it's used in making propeller shafts for nuclear subs, lignum vitae is one of the world's hardest types of this
Wood
She has a thing for Kermit the Frog
Miss Piggy
Estonia has Russia to the east & this country to the south
Latvia
A strong or violent change, or disturbance, as in a society or environment
Upheaval
During sleep, your brain is busy moving new memories from this part of the brain to the neocortex for long-term storage
The hippocampus
This word refers to what's been done to steel if it's heated to a high temperature, then cooled for increased hardness
Tempered