If you’re the oldest of your brothers and sisters, here’s some news that they’re probably not going to like (but you’re gonna love).

According to a study by University of Edinburgh, Analysis Group and University of Sydney, first-born kids have a higher IQ and better thinking skills than their younger sibs. The Guardian reports that this stat is shown as early as age one. Hey, you can’t argue with science, right?

The research (which studied 5,000 children from pre-birth to age 14) has suggested the reason for this is that the eldest got more attention when it came to activities that boost mental stimulation and thinking skills.

The first-borns were found to have higher marks on even more tests, like picture vocabulary and reading, which scientists put down to a thing called the ‘birth order effect’. This theory is that the first child predominantly pursues high-level education, leading to higher wages.

But it’s not all bad news for the younger sibling! Another study suggests that they’re the funniest and more laid-back. So, which one are you?

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