Ravens pass tests of planning ahead in unnatural tasks
Challenges not found in nature strengthen case that certain birds evolved some apelike thinking
![raven](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/07/071317_SM_raven_main.jpg?fit=860%2C460&ssl=1)
SUPERPOWER Ravens may have a birdlike version of the power to plan ahead — as apes do.
M. Osvath/Lund University