DinoLine
Oldest on the left, newest on the right.
Easy mode: the left card must be earlier than, or overlap with, the card on the right.
Hard mode: by extinction date - the left card must have gone extinct before the right card. Ties are allowed.
New game
Only should look at the screen. Others, please step back.
Timeline
oldest→newest, in millions of years ago (Mya)
Your hand
Not quite!
Above is the date side of your card. When you continue, it moves to the correct place on the timeline and you draw a replacement card.