Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls ...

Giant freshwater crayfish, longer and bulkier than today's species, roamed New Zealand 20 million years ago. They would have made a perfect snack for the crocodiles and trout-sized whitebait that ...

Ocular migraine might refer to retinal migraine or migraine with aura. While retinal migraine doesn’t occur in stages, migraine with aura may occur in up to four stages. Ocular migraine is ...