1 слово в каждом пункте Scientists still arent sure whether the laws

1 слово в каждом пт

Scientists still arent sure whether the laws of physics allow us (0) ---------- -------------
build a time machine. Some scientists argue that its (1 ) -------------------- possible,
using this logic: if we built a time machine and travelled back into the past, we
(2 ) __________________ be able to stop our parents meeting. Then wed never be born!
(3 ) __________________ , however, argue that that isnt a real problem. We just wouldnt be
born in this universe, but wed still be born in a parallel universe. Strange, isnt it?
(4 ) __________________you want to travel into the past, its actually very easy. Just look
(5 ) __________________at the night sky. When you see a star in the sky, (6)
you see it as it is right now? No, you see it as it was millions of years ago. This is
(7 ) ___________________ the light from the star has taken millions of years to travel across the
universe to reach your eyes.
Travelling into the future is more difficult, but Einstein proved (8 ) --------------------
is theoretically possible. You can achieve this so (9 ) -------------------- as you have a
spaceship that goes really fast - nearly at the speed of light, (10)-------------------- is very
fast indeed. If you go off in your spaceship and fly around for, lets say, six months, when
you come back (1 1 )___________________ Earth you'll be in the future. How much in the future?
If your spaceship goes at 99.99% of light speed, all your friends you left behind
(1 2 )___________________ be almost 50 years older than you. Its incredible, but its true!