3 ms·
Only if it was sufficiently detrimental, and did not arise as a byproduct of other, evolutionarily beneficial changes. If it had "disappeared in humans a long
by Firadeoclus 7y ago
Only if it was sufficiently detrimental, and did not arise as a byproduct of other, evolutionarily beneficial changes.
If it had "disappeared in humans a long time ago" then that still implies a time when it existed. And if it could have existed, it could exist now.