The girls were still sleeping when Marie and I got up to shower -- "I love the en suite," Marie smiled -- and I wrote a note for them before we left. "Gone to mess with the fabric of reality -- see you for dinner. Xx"
We took Marie's car, and she drove us to the out-of-town science park where the physics lab was located. The keycard from the lanyard round her neck, and a quick tap at the keypad -- "You'll need to know the combination anyway --" and we were in, walking down gleaming corridors to the high-roofed space where Marie and her team worked.
Marie walked over to a semi-circular console, a row of screens lighting up as she threw switches. "Pull up a chair," she invited.
She picked up a telephone handset, dialling. "Hi, it's the lab," she said when the call was answered. "Yes, about ten minutes."
I looked at her enquiringly when she put the phone down. "The experiment uses quite a lot of power," she explained. "We have to let the utility company know when we're about to operate."
More switches, and a distinct humming sound filled the air. Marie adjusted verniers, checking readings, then pointed across the lab. "Everything's ready -- watch."
I followed thick cables from where we were sitting, leading to a raised platform which supported something like a circular segment from a huge industrial turbine, hollow in the middle. Marie counted under her breath, and closed the last breaker. "Oh -- my -- god," she enunciated.
Filling the empty circle was now a rippling surface of velvet blackness, seeming somehow to swallow the light falling on it from the fluorescent tubes above us. "Is it supposed to do that?" I asked.
Marie's hand covered her mouth in astonishment. "We've put high speed cameras on it, of course. The longest the effect's ever lasted before was a millionth of a second."
She kissed me hard on the lips. "I knew you were a genius. Those equations were the key."
She grinned. "Ever fancied a trip to Stockholm?"
I glanced again at the rippling circle. "Er, Marie... Does it, well, go anywhere?"
"We'll have to prepare a probe," Marie said decisively. She tapped keys, then pulled the breaker. The rippling surface collapsed, my eyes momentarily failing to make sense of what I saw, as though light from dimensions beyond the usual was falling on them.
She took a deep breath. "This could be the biggest thing since the Manhattan Project."
I nodded. "We should celebrate. Shall we get back, tell the girls?"