6 results for “dark matter”

1. Animals

   Mammals

   matter to biologists: a single lower jawbone, three tiny bones in the middle ear that evolved from reptile jaw bones, a diaphragm for breathing, and a large brain relative to body size

   Article · 4 min read

   

2. Animals

   Sharks

   dark. The Greenland shark drifts through Arctic waters at a kilometre an hour and lives for 400 years or more, reaching maturity at 150. Wobbegongs lie camouflaged on reefs; thresher sharks stun

   Article · 3 min read

   

3. Animals

   Animal Migration

   dark depths to feed near the surface, and every dawn they sink again to hide from predators. In sheer weight of life on the move, nothing else comes close. Finding

   Article · 4 min read

   

4. Animals

   Whales and Dolphins

   darkness, holding its breath for over an hour. Baleen whales do not echolocate but sing. Humpback males produce long, structured songs, with repeated themes and phrases, lasting up to half an hour

   Article · 4 min read

   

5. Animals

   Reptiles and Amphibians

   dark with infrared sensors on their faces. Turtles and tortoises carry a shell of bone fused to the ribs and spine, a design unchanged for 200 million years; they are among

   Article · 3 min read

   

6. Animals

   Birds

   darkness by sound alone. Migration Every autumn billions of birds leave the north for warmer places, and every spring they return, often to the exact tree. The Arctic tern breeds

   Article · 3 min read