Cows can sleep standing up, but they can only dream lying down.
745
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Your thumb is about the same size as your nose.
124
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Your body is creating and killing about 2.4 million red blood cells per second.
17