From Great Dane to Tiny Terrier, A Mutation Creates Enormous Variation in Dog Sizes

From chihuahuas to great Danes, dogs differ more in size than any other mammal species on the planet. A mutation behind such variation has been traced to an unexpected source: ancient wolves. The mutation lies near a gene called IGF1, which researchers flagged 15 years ago as having a major role in the size variation of … Read more

Spectacularly Rare, Enormous Eagle Shows Up in North America, 5,000 Miles From Home

Bird watchers in Massachusetts have been given an early Christmas present in the form of an incredibly rare sighting – a Steller’s sea eagle, which is native to Asia almost 8,000 km (5,000 miles) away.   The large sea eagles are native to the Kamchatka Peninsula in far eastern Russia, and also seen in Japan, … Read more

Exoplanets: Extremely dense world with an enormous iron core has an 8-hour year

By Leah Crane The exoplanet GJ 367b orbits its star in an extremely short time SPP 1992 (Patricia Klein) An extraordinarily dense exoplanet seemingly made mostly of iron has joined a group called the ultrashort-period planets that orbit so close to their stars that their years are less than one Earth day long. Kristine Lam, … Read more