Former Doctor Who star Tennant and his fiance Georgia celebrated the birth of their daughter, Olive, on 31 March.
The couple met in 2008 after the 26-year-old actress starred alongside David in an episode of the long-running series.
Moffett already has a son called Ty, who was born when she was 17.
22,000 people agreed to clean toilets for WiFi because they did not read the terms.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.