measurement error; calculation error
how many years; how long; what year
won't; hasn't; isn't; won't you
100,000,000; one hundred million
exceedingly; extremely; very many; indeed
existence; being; survival; to exist; to live; to survive
trace; vestige; mark; sign; evidence
to throw away; to abandon
ground; earth; the solid earth; the (vast) land
stage; step; level; rank; order; stairs
around the world; throughout the world
every place; various places
nuclear attack; nuclear strike
to comfort; to console; to amuse
civil war; insurrection; rebellion; domestic conflict
to spoil; to break; to go bad; to go wrong; to fail
escape; break-out; prolapse; proptosis
just a handful; only a small number (of)
to cross over; to cross; to pass through; to exceed; to surpass; to be more (than)
beyond expectations; beyond what one expected; not foreseen; exceeding assumptions
outside Earth's atmosphere; outer space; exoatmosphere; exo-atmosphere
emergence (of insects); eclosion; growing wings
interior; inside; internal
exclusion; removal; rejection; elimination; abatement; lifting (sanctions, etc.)
and; thereupon; because of that
turns and twists; ups and downs; meandering; complications; vicissitudes
war; fighting; fierce competition
invasion; incursion; raid; aggression; intrusion; trespass
end (e.g. of street); tip; beginning; start; odds and ends; scrap
to herd; to drive; to corner; to force someone into doing; to go hard; to push yourself
once; for a short time; briefly; (arch.) one morning
inferiority (e.g. numerical); inferior position; disadvantage; unfavorable situation; unfavourable situation
to take refuge in; to succeed in running away
though; although; be that as it may; nonetheless
to become rounded; to roll into a ball
lukewarm; tepid; lenient; (arch.) slow; (arch.) stupid