Olivia cradles her cup between her hands and sits back while he talks. Except for the aliens, this place doesn't sound so different from home. She's sure the exact kinds of mad science and enemies are a little different, but compared to the world she just came from...

"In your day," she echoes with a faint frown. "How old are you?"

If she had to guess, she'd say he's younger than she is, and certainly younger than Stark. Given the things she's seen... preventing ageing can't be more difficult than turning people into monsters or joining their consciousnesses or plenty of things she knows are perfectly possible - by comparison, making someone appear a fraction of their actual age seems like it must be simple - but it's more than just his appearance. He seems young. Too young for that particular phrase to sound anything but strange coming from him.