A new type of photoreceptor has now been discovered -- only the third to be found in animals -- that is about 50 times more efficient at capturing light than the the human eye.
Biochemists have solved an old mystery behind smelly camel urine, with implications for millions affected by African parasites that frequently cause fatalities via sleeping sickness.
Life in the wild harbors the risk of predation, food shortages, harsh climates, and intense competition. Zoo animals, by contrast, are protected from these dangers.