Animals

Monday, 9 February 2026
15 facts about fleas
15 facts about fleas
External parasites
Fleas are one of the most hated insects by pet owners. Once they find their way onto a dog or a cat, they are very hard to remove. Reproducing at a ve ...

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Turtles
The largest turtle known so far was Archelon ischyros.
The body length of this marine giant was as long as 4.5 m and its weight was about 2.2 t. It lived a ...
Butterflies
The life span of butterflies varies from a few hours to several months, depending on the species.
Migratory species tend to live longer.
Basking shark
Basking shark (Cetorhinus maximus) is a species of large marine cartilaginous fish.
Cartilaginous fishes are a cluster of aquatic vertebrates that includes chimaeras, rays and sharks - ...
Rice's whale
A typical lifespan of a Rice’s whale is 60 years.
European pine marten
The marten's gestation period can last up to 9 months, with fetal development occurring mostly in the second half.
Between 2 and 7 young (4 on average) are born per litter. The average weight of a newborn marten is ...
Axolotl
The axolotl genome is approximately ten times longer than the human genome.
It is the second longest in the animal kingdom.
True seals
Depending on the species, seals may use different foraging tactics.
Some are filter feeders and feed on krill, while others suck small prey into their mouths or grab la ...
Pink river dolphin
They are not very acrobatic, contrary to other dolphins.
They would rather emerge their snout above the water's surface than jump out as dolphins do.
Hummingbirds
There are only two pigments in hummingbird feathers - black and brown.
They owe their colorful appearance to their feathers' ability to split light into primary colors.
Housefly
Flies as biological weapons were used during World War II.
The Japanese, under the leadership of Shirō Ishii, worked on entomological warfare techniques. They ...