Stag beetle
The stag beetle is a bug. It has big jaws. They look like deer horns. The males use them to fight. These bugs are very slow. They like to fly. Have you seen a big bug?
Early Reader · Change the reading level on the articleLife Science articles — Page 104
Read about living things, from cells and plants to animals and the human body. Choose an article below; its reading controls let you move between the available levels.
5,533 public articles · Page 104 of 116
Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.
Staining
Scientists use color to see tiny things. They use special dyes. These dyes make small parts stand out. It helps us see things that are hard to find. It is like using a bright marker. Can you see the colors?
Early Reader · Change the reading level on the articleStaphylococcal infection
{ "text":\"Tiny germs live on our skin. They can get inside a small cut. This can make your skin red and sore. It may even make a bump. Doctors use medicine to help you feel better. Do you wash your hands?\",…
Early Reader · Change the reading level on the articleStaphylococcus
Tiny germs live on our skin. They look like bunches of grapes. Some are good for us. Some can make us sick. We must stay clean. Do you like to wash your hands?
Early Reader · Change the reading level on the articleStar-nosed mole
The star-nosed mole is a small animal. It lives in wet places. It has a funny nose that looks like a star. This nose helps it find food. It is a very fast eater. Do you like to eat fast?
Early Reader · Change the reading level on the articleStatin
Some pills help your heart. They lower things in your blood. This helps keep you healthy. Doctors give them to some people. It is good to stay strong. Do you eat healthy food too?
Early Reader · Change the reading level on the articleStegoceras
This was a small dinosaur. It had a thick dome on its head. The dome grew as it got older. It likely ate plants. It lived a long time ago. Do you like dinosaurs?
Early Reader · Change the reading level on the articleStegodon
These animals looked like elephants. They had very big teeth. They had very long tusks too. Some lived on small islands. They grew to be very small. They lived a long time ago. Do you like big animals?
Early Reader · Change the reading level on the articleStegodontidae
These big animals lived long ago. They lived in Africa and Asia. They had very special teeth. Their teeth had ridges on them. They were like old elephants. These animals are gone now. Do you like big animals?
Early Reader · Change the reading level on the articleStegosauria
Some dinosaurs had plates on their backs. These big plates grew in lines. They had sharp spikes on their tails. The spikes helped them stay safe. These dinosaurs ate plants. They lived a long time ago. Do you like…
Early Reader · Change the reading level on the articleStele (biology)
Plants have a middle part. It is in the stem. It is in the root too. This part helps the plant live. It carries things inside. It is very helpful! Can you find a plant?
Early Reader · Change the reading level on the articleSteller's sea cow
The sea cow was a huge animal. It lived in cold water. It ate green seaweed. The sea cow was very big. It is gone now. Do you like sea animals?
Early Reader · Change the reading level on the articleStenopodidea
Boxer shrimp are small sea animals. They have very big legs. They carry their eggs with them. This helps the babies stay safe. These shrimp live in the water. They are fun to see. Can you find one?
Early Reader · Change the reading level on the articleStenotherm
Some animals like the same heat. They live in very cold places. They cannot live in hot water. A small change can hurt them. This helps us learn about them. Do you like the cold too?
Early Reader · Change the reading level on the articleStephen Hales
Stephen Hales was a smart man. He studied plants and animals. He found how blood moves in the body. He also made tools to help people breathe better. His work helps us learn today. Do you like to learn new things?
Early Reader · Change the reading level on the articleSteppe bison
Long ago, big bison lived on the earth. They had large horns. They lived in big groups. These animals are gone now. We can see their bones in the ground. Can you imagine a big bison?
Early Reader · Change the reading level on the articleSteppe eagle
The steppe eagle is a big bird. It flies high in the sky. It likes to hunt small animals. It can even build a nest on the ground. This bird is very special. Do you like big birds?
Early Reader · Change the reading level on the articleStereospondyli
Long ago, these animals lived in water. They lived on every part of the Earth. Some were big and some were small. They looked a bit like crocodiles. We find their bones in the ground. Can you find a fossil?
Early Reader · Change the reading level on the articleSterilization (microbiology)
We use heat to clean things. This kills tiny germs. It makes tools safe to use. It also keeps food good. This helps us stay well. Do you like clean tools?
Early Reader · Change the reading level on the articleSternum
You have a flat bone in your chest. It is in the middle of your body. This bone helps keep your heart safe. It is part of your rib cage. It helps you stay strong. Can you feel your chest?
Early Reader · Change the reading level on the articleSteroid hormone
Your body makes special things. These help you grow. They help you stay well. They also help you stay strong. They work inside your cells. Can you feel them working?
Early Reader · Change the reading level on the articleStethacanthus
A long time ago, a shark lived in the sea. It had a strange fin on its back. The fin looked like a flat board. This helped the shark stay safe. It was a very cool fish. Do you like sharks?
Early Reader · Change the reading level on the articleSteve Irwin
Steve Irwin loved animals. He worked at a big zoo. He helped save wild animals. This helped the world stay healthy. He was a kind man. Do you love animals too?
Early Reader · Change the reading level on the articleStick mantis
Some bugs look like small sticks. They hide in trees. This helps them stay safe. They look just like a twig. It is a fun trick! Can you find them?
Early Reader · Change the reading level on the articleStilt
A stilt is a bird. It has very long legs. It has a long, thin beak. These birds live near warm water. They eat small bugs in the water. You can see them in big groups. Do you like birds?
Early Reader · Change the reading level on the articleStingless bee
These bees have no sting. They live in big groups. Some make sweet honey. People like to eat it. They are very helpful. Do you like honey?
Early Reader · Change the reading level on the articleStomach cancer
Some people get sick in their stomach. This sickness comes from bad cells. It can make your tummy hurt. It can also make you feel sick. Doctors can help you get better. Do you eat healthy food?
Early Reader · Change the reading level on the articleStomatosuchidae
Some old crocs lived long ago. They had flat heads. Their jaws looked like a duck. They lived in Africa. It is fun to learn about them. Do you like old bones?
Early Reader · Change the reading level on the articleStomiiformes
Some fish live in the deep sea. They can make their own light. This light helps them in the dark. They have very big mouths. These fish are very cool. Do you like deep sea fish?
Early Reader · Change the reading level on the articleStone-curlew
These birds are called thick-knees. They have big yellow eyes. They live in dry places. They like to eat bugs. They come out at night. Do you like to see birds?
Early Reader · Change the reading level on the articleStone pine
The stone pine is a tall tree. It looks like a big umbrella. It grows green needles. This tree gives us tasty food. We call these pine nuts. Do you like to eat nuts?
Early Reader · Change the reading level on the articleStrain (injury)
Your muscles can get hurt. This can happen if you move too fast. It might hurt your leg or back. You can rest to feel better. You can also use ice. It helps you heal. Have you ever had a sore muscle?
Early Reader · Change the reading level on the articleStrelitzia
Some flowers look like birds. They have bright colors. They grow in a place called South Africa. Birds land on them to eat. This helps the plant grow. Do you like bright flowers?
Early Reader · Change the reading level on the articleStrepsiptera
Some bugs live inside other bugs. They hide inside bees or wasps. The tiny bugs stay safe inside. This helps them grow big. Do you think they are hard to find?
Early Reader · Change the reading level on the articleStreptococcal pharyngitis
A sore throat can happen to you. It can make your neck feel bad. You might also have a fever. It can spread when we cough or sneeze. Wash your hands to stay well. Do you feel okay today?
Early Reader · Change the reading level on the articleStreptococcus
Tiny germs live in your mouth. Some grow in long chains. They look like little grains. Some help make cheese. Others can make you sick. Can you stay healthy?
Early Reader · Change the reading level on the articleStreptococcus pneumoniae
Tiny germs live in our noses. Some of these germs can make us sick. They can cause a bad cough. This can happen to kids or old people. We can use medicine to help. Do you stay healthy?
Early Reader · Change the reading level on the articleStreptococcus pyogenes
Tiny germs live in our bodies. These germs look like little round berries. They hang in long chains. Sometimes, they can make you sick. They can cause a sore throat. We can stay well by being careful. Do you like to…
Early Reader · Change the reading level on the articleStretching
You can stretch your body. It helps you move well. Many animals stretch too. It can help you feel good. It is fun to try. Do you like to stretch?
Early Reader · Change the reading level on the articleStrigidae
Owls are birds with big heads. They live on almost every land. Some are very small. Some are very big. They fly very quietly to hunt. This helps them catch food. Can you see an owl in a tree?
Early Reader · Change the reading level on the articleStrigolactone
Plants make things in their roots. These things help the plant grow. They help the plant find food from the soil. They also stop the plant from growing too many branches. This helps the plant stay strong. Do you like…
Early Reader · Change the reading level on the articleString
Tiny parts in our bodies work together. They act like a big team. We use a tool to see them. It shows how they link up. This helps us learn about life. It is very cool to see! Do you like teams?
Early Reader · Change the reading level on the articleStrix (bird)
These are big, strong owls. They live in the woods. They come out at night. They hunt for small animals. They make a soft hoot sound. Can you hear them?
Early Reader · Change the reading level on the articleStrobilus
Some plants have small cones. These cones grow on a stem. They help the plant make more plants. They are very neat and tight. It is cool to find them! Can you find a cone outside?
Early Reader · Change the reading level on the articleStrongylocentrotus purpuratus
The purple sea urchin is a small animal. It lives in the deep blue sea. It is a dark purple color. Some people even eat it for food. These tiny animals can live a long time. Do you like the ocean?
Early Reader · Change the reading level on the articleStructural biology
Small parts make up living things. These parts have special shapes. The shapes help them work. Scientists use tools to see them. They look at how they move. This helps us stay well. Can you imagine tiny shapes?
Early Reader · Change the reading level on the articleStructural coloration
Some things have bright colors. These colors come from tiny shapes. The shapes play with light. This makes colors like blue or green. It can even change as you move. It is very pretty! Do you see bright colors outside?
Early Reader · Change the reading level on the articleStrychnine
Some seeds can be very bad. They come from a special tree. This can make animals very sick. It makes their muscles jump and twitch. We must stay safe from it. Have you seen a special tree?
Early Reader · Change the reading level on the article