The Sonic Hedgehog gene drives embryonic development of mammal limbs and shark gills. Could our limbs have evolved from gills?
Posts by Shireen Gonzaga
Iron-60 found in moon rocks supports an earlier finding that – 2 million years ago – a supernova exploded only 300 light-years away.
In the forests of South America and New Zealand, trap-jaw spiders have mouths clamp down on their quarry like a mousetrap, at lightning speeds.
Fish evolved into the first land vertebrates 420 million years ago. Clues to that fins-to-limbs transformation may lie in a walking blind cavefish in Thailand.
Scientists used fossil remains and primitive tools to build a vivid description of what life was like for our early human ancestors, 1.8 million years ago.
With fat deposits that almost double their weight, the tiny ruby-throated hummingbird can fly non-stop for more than 1,200 miles (2,000 km) during migration.
A pink meteorite inclusion nicknamed Curious Marie shows that a highly unstable element, curium, was present in the early solar system.
More information about early human settlements – and in this case the insects who lived alongside them – is being found in ancient bits of broken pottery.
In the Hanke-Henry Permanent Calendar, there are no leap years and Christmas always falls on a Monday. Plus, it’s the same time everywhere on Earth.
Wisdom, a Laysan albatross, is at least 65 years old. Her latest chick hatched at the Midway Atoll National Wildlife Refuge on February 1.