There is a whole science behind reading palms and it can actually predict future or even tell the past.
Tips on how you should hold and see your palm lines:
Zoom in on the area directly underneath your little finger, and examine it in a natural light if possible. You may see one or more horizontal lines or creases running from the side of your palm underneath your little finger - these are your relationship lines, and represent the particularly close bonds you will have with others throughout your lifetime.
Getty Images
Most people have between 1-5 lines, and it’s interesting to check both hands. Your dominant hand will reflect the relationships which actually happen, and your other hand indicates the potential for new ones.
The state of each line’s end (the end is closer in towards your palm, rather than at the edge of your hand) is said to reflect the nature of the relationship.
For instance:
A deep, straight line reflects a long lasting and strong union. If the line is very long (ending beneath the ring or middle finger) it is said to represent your ‘soul-mate’.
A line which dips downwards suggests a bullying or domineering partner.
A line which turns upwards suggests a partner who is rich or successful.
A fork at the end of the line predicts a relationship with a sudden ending.
A line which looks more like two parallel lines very close together suggests you may live separate lives.
Some say that if there are vertical lines branching directly from a relationship line, these represent the children from that bond, or significant things created together.
Source:Cosmopolitan.com