#1
#2
#3
#4
Blue whale and ships
#5
#6
#7
#8
It's rare for a horseshoe crab to swim, this is how they do it, upside down.
#9
#10
#11
Plants grown on a space station can still grow normally even when there is no gravity to define an up-down axis
#12
#13
#14
#15
How a fire sprinkler works
#16
#17
#18
#19
#20
Votes:
(16 votes)