Practice your skills of measurement and estimation using this interactive measurement tool based around fascinating images from biology.
Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?
Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?
Which dilutions can you make using only 10ml pipettes?
Can you work out the parentage of the ancient hero Gilgamesh?
How much energy has gone into warming the planet?
How many generations would link an evolutionist to a very distant ancestor?
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
Making a scale model of the solar system