THE NUMBER OF MONARCH BUTTERFLIES THROUGHOUT THE UNITED STATES HAS DWINDLED OVER THE PAST FEW DECADES. At Pismo Beach, California, one the largest of colonies in North America, volunteers counted 24,000 butterflies in November 2022. About 25 years ago, that number was closer to 100,000.
Scientists say that while climate change is a problem for monarchs, their biggest threat is disappearing milkweed. Milkweed plants are important to monarchs. Caterpillars munch only milkweed, while butterflies sip nectar from milkweed and a variety of other flowers. When it comes time to lay eggs, only milkweed leaves will do.
But there are fewer milkweed plants in North America for monarchs. Milkweed is destroyed when open fields are plowed to make way for new neighborhoods.
この記事は Muse Science Magazine for Kids の March 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です ? サインイン
この記事は Muse Science Magazine for Kids の March 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
A Mars Rock Found With Leopard Spots Could Be a Sign of Ancient Life
IN JULY, NASA'S PERSEVERANCE ROVER CAME ACROSS A SPOTTED ROCK IN WHAT WAS ONCE A RIVERBED IN THE JEZERO CRATER ON MARS.
Para Athlete Uses Exoskeleton Suit to Carry the Olympic Torch
In July, a 36-year-old French tennis para athlete, Kevin Piette, got a chance to participate in this summer’s Olympic torch relay without using a wheelchair.
Ancient Egyptians May Have Used a Water System to Lift Stones to Build Pyramid
HOW ANCIENT EGYPTIANS BUILT THE MASSIVE PYRAMIDS IN EGYPT MORE THAN 4,000 YEARS AGO HAS LONG BEEN A TOPIC OF WONDER AND DEBATE.
Seals Can Make Big Dives Thanks to Their Big Hearts
SEALS AND SEA LIONS, WHICH ARE SEMI-AQUATIC MAMMALS, CAN HOLD THEIR BREATHS UNDERWATER FOR ESPECIALLY LONG PERIODS OF TIME.
THE BIG-CITY LIFE OF STEVEN J.BIKE SHOP RABBIT IN BROOKLYN, NEW YORK
Bicycle Roots is a full-service bike shop. It's in the heart of Brooklyn, New York. Joe Lawler is the co-owner and service manager. Perhaps more important, he's \"dad\" to the shop's most popular employee. That's Steven J. Lawler.
Wild Ones
WHAT FACTORS DRIVE PEOPLE TO BUY MONKEYS, TIGERS, AND OTHER WILD ANIMALS?
HOW TO CONQUER THE WORLD
A brief history
What would happen if meteors hit Earth?
You may have seen Ameteors fly into Earth's atmosphere, in the form of shooting stars.
WORKING WORMS
DON'T JUST THROW THOSE TABLE SCRAPS AWAY! LET A BOX OF WORMS TURN THEM INTO SOMETHING USEFUL.
Dog Rescue Saves Lives
THE ARGUMENT FOR ADOPTING A NO-KILL GOAL
